Effect of antiblock and slip additives on the properties of tubular quenched polypropylene film

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ashwith Melkar ◽  
Ravi Kumar ◽  
Vishwa Pratap Singh ◽  
Priyanka Singh ◽  
Satyajit Samanta ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Transverse Direction ◽  
Film Surface ◽  
Screw Extruder ◽  
Machine Direction ◽  
Polypropylene Film ◽  
Film Properties ◽  
Tear Strength ◽  
Twin Screw ◽  
Slip Agent

Abstract In the present investigation, silica and talc were used as antiblock additives with slip additive to investigate their effects on tubular quenched polypropylene (TQPP) film properties. Polypropylene (PP) powder was compounded with additives in twin-screw extruder and subsequently processed through TQPP machine to prepare the films. Tear and tensile properties [in machine direction (MD) and transverse direction (TD)] and surface properties of the produced TQPP films were investigated in terms of optics and coefficient of friction (CoF). The effect of conditioning time on CoF was also studied. Addition of slip agent alone to PP did not show any significant change in tear strength, CoF and tensile properties, whereas CoF reduced drastically by adding both slip and antiblock agents in combination. Reduction in CoF values were found to be more pronounced in the presence of silica-based antiblock compared to talc-based antiblock. Film surface morphology was further examined by field-emission scanning electron microscopy. The tear strength and the gloss of TQPP film decreased slightly in presence of only antiblock agents, but the tensile strength was found to increase. It was also found that tensile properties of TQPP films were superior in silica-based formulation, whereas tear strength was better in talc-based formulation in MD and TD.

scholarly journals Influence of the Phase Inversion on Mould-Shrinkage, Mechanical- and Burning Properties of Polymer Blend

2017 ◽  
Vol 885 ◽  
pp. 36-41 ◽  
Author(s):  
Károly Dobrovszky ◽  
Ferenc Ronkay
Keyword(s):  
Physical Properties ◽  
Polymer Blends ◽  
Tensile Properties ◽  
Polymer Blend ◽  
Phase Inversion ◽  
Viscosity Ratio ◽  
Screw Extruder ◽  
Binary Polymer ◽  
Mechanical And Physical Properties ◽  
Twin Screw

Blending polymers is an effective method to develop novel materials, tailoring the properties of the components. However, different morphology structures can be formed during the preparation, which could result in a wide diversity of mechanical and physical properties. The properties of polymer blends are most significantly influenced by the emerging range of phase inversion, which depends on the composition ratio and the viscosity ratio. In this paper various blends were prepared, utilizing polyethylene terephthalate (PET), polystyrene (PS) and two high density polyethylenes (HDPE), which differ in flowability. After preliminary homogenization by twin screw extruder, standard injection moulded specimen were prepared in order to present the effects of phase inversion on tensile properties, shrinkage and burning characteristics in binary polymer blends.

Characterization and Properties of Nucleated Polylactide, Poly(butylene adipate-co-terephthalate), and Thermoplastic Starch Ternary Blend Films: Effects of Compatibilizer and Starch

2013 ◽  
Vol 747 ◽  
pp. 673-677 ◽  
Author(s):  
Worasak Phetwarotai ◽  
Duangdao Aht-Ong
Keyword(s):  
Tensile Properties ◽  
Nucleating Agent ◽  
Thermoplastic Starch ◽  
Ternary Blend ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Blend Films ◽  
Flexible Polymer ◽  
Twin Screw ◽  
Thermal Stability Of

Biodegradable ternary blend films of nucleated polylactide (PLA), poly (butylene adipate-co-terephthalate) (PBAT), and thermoplastic starch (TPS) with the presence of nucleating agent and compatibilizer were prepared via a twin screw extruder. The effects of compatibilizer types and starch contents on the thermal, morphological, and tensile properties of these blend films were evaluated. Two types of compatibilizer (methylene diphenyldiisocyanate (MDI) and polylactide-graft-maleic anhydride (PLA-g-MA)) were used for enhancing an interfacial adhesion of the blends, whereas TPS from tapioca starch was added as a filler at various concentrations (0 to 40 wt%). In addition, talc and PBAT acted as a nucleating agent and a flexible polymer were fixed at 1 phr and 10 wt%, respectively. The results indicated that the thermal stability of the blend films was affected from the presence of compatibilizer and TPS. In addition, the tensile properties and compatibility of PLA, PBAT, and TPS blends were improved with the addition of compatibilizer compared to uncompatibilized blend films as evidenced by SEM results. Furthermore, the blend films with MDI gave higher mechanical properties than those with PLA-g-MA at all compositions. The water absorption of the ternary blend films was evidently increased when the TPS amount was increased; in contrast, tensile strength and elongation at break (EB) of these blend films were significantly decreased.

Studies on Tensile Properties of Compatibilized and Uncompatibilized Low-Density Polyethylene/Jackfruit Seed Flour (LDPE/JFSF) Blends at Different JFSF Content

2017 ◽  
Vol 264 ◽  
pp. 120-123 ◽  
Author(s):  
Sung Ting Sam ◽  
Omar Sabbar Dahham ◽  
Pei Gie Gan ◽  
N.Z. Noimam ◽  
Jingi Y. Kuan ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Adipic Acid ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Direct Introduction ◽  
Elongation At Break ◽  
Seed Flour ◽  
Before And After ◽  
Twin Screw ◽  
Natural Fillers

Currently, natural fillers seem to be the suitable materials in polymer industry, which have emerged as a viable and abundant replacement for the relatively high-cost and non-renewable conventional fillers. However, the direct introduction of natural fillers into polymer matrix could effect negatively on some properties. Therefore, the aim of this work is to evaluate the influence of jackfruit seed flour (JFSF) (before and after compatibilization) on the tensile properties of (LDPE/JFSF) blends. Different JFSF content (5, 10, 15 and 20 wt.%) with (63-100 𝜇𝑚) particle size were prepared in this work. Twin-screw extruder at 150°C and 50rpm screw speed followed by hot-compress machine at 150°C and 10MPa pressure were used respectively to produce (LDPE/JFSF) blends. Adipic acid (AA) solution was added as a compatibilizer into all blends equally (25wt% AA into 75wt% JFSf). The changes of tensile and morphological properties were investigated. Results shown decreasing on tensile strength and elongation at break of LDPE/JFSF and LDPE/JFSF/AA as JFSF increased. In contrast, Young’s modulus increased up to 10 wt.% of JFSF and then decreased. However, the addition of Adipic acid, particularly for JFSF 5wt.% has improved the tensile properties of LDPE/JFSF blends. The SEM micrographs showed the agglomeration at high JFSF content (20 wt%) which in turn effected negatively on the tensile properties. However, the blends show homogeneous surfaces as AA added.

Characterization of Linear Low Density Polyethylene/Rambutan Peels Flour Blends: Effect of Loading Content

2016 ◽  
Vol 673 ◽  
pp. 171-179 ◽  
Author(s):  
A. Ainatun Nadhirah ◽  
S.T. Sam ◽  
N.Z. Noriman ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Mohd Firdaus Omar ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Testing Machine ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Screw Extruder ◽  
Twin Screw ◽  
Flour Blends

The effect of rambutan peels flour (RPF) content on the tensile properties of linear low density polyethylene filled with rambutan peel flour was studied. RPF was melt blended with linear low–density polyethylene (LLDPE). LLDPE/RPF blends were prepared by using twin screw extruder at 150°C with the flour content ranged from 0 to 25 wt%. The tensile properties were tested by using a universal testing machine (UTM) according to ASTM D638. The highest tensile strength was pure LLDPE meanwhile the tensile strength LLDPE/RPF decreased gradually with the addition of rambutan peels flour. Young’s modulus of rambutan peels flour filled LLDPE increased with increasing fiber loading. The crystallinity of the blends was significantly reduced with increasing RPF content. Instead, the water absorption increased with the addition of RPF content.

Preparation of Polypropylene/Sisal Fiber Composites and Study on the Fiber Orientation

2014 ◽  
Vol 989-994 ◽  
pp. 581-586
Author(s):  
Rong Yuan Chen ◽  
Zan Huang ◽  
Wei Zou ◽  
Hai Chen Zhang ◽  
Jin Ping Qu
Keyword(s):  
Tensile Properties ◽  
Fiber Orientation ◽  
Extrusion Direction ◽  
Tensile Tests ◽  
Fiber Composites ◽  
Sisal Fiber ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Better Than

The polypropylene/sisal fiber composites were prepared by twin screw extruder and vane extruder, respectively. The tensile test specimens perpendicular to the extrusion direction and parallel to the extrusion direction were prepared from the extruded composites, respectively. SEM observation showed that fiber orientation of sisal fiber in the composites was not obvious when the content of sisal fiber not more than 15wt%. When the content of sisal fiber was 15wt%, the ability to orientate of sisal fiber in the composite prepared by vane extruder was better than that of in the composite prepared by twin screw extruder, which the fiber orientation of sisal fiber was obvious along the extrusion direction in the composite. Tensile tests showed that the tensile properties of the composite parallel to the extrusion direction with 15wt% sisal fiber prepared by vane extruder were the best compared with other composites in this work. The results illustrated that the orientation of sisal fiber in the composites was beneficial to the improvement of the tensile properties of the composites.

Processing, Thermal Behavior and Tensile Properties of PLA/Thermoplastic Starch/Montmorillonite Nanocomposites

2013 ◽  
Vol 684 ◽  
pp. 75-79
Author(s):  
Esmat Jalalvandi ◽  
Taravat Ghanbari ◽  
Hossein Cherghibidsorkhi ◽  
Ehsan Zeimaran ◽  
Hamid Ilbeygi
Keyword(s):  
Tensile Strength ◽  
Glass Transition ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Thermal Behavior ◽  
Tensile Properties ◽  
Thermoplastic Starch ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Twin Screw

Thermoplastic starch, polylactic acid glycerol and maleic anhydride (MA) were compounded with natural montmorillonite (MMT) through a twin screw extruder to investigate the effects of different loading of MMT on tensile properties and thermal behavior of the nanocomposites. Tensile results showed an increased in modulus, tensile strength and elongation at break. However, beyond 3phr of MMT the modulus of samples decreased because the MMT particles agglomerated. The thermal properties were characterized by using differential scanning calorimeter (DSC). The results showed that MMT increased melting temperature and crystallization temperature of matrix but reduction in glass transition temperature was observed.

scholarly journals Degradation of Styrenic Plastics during Recycling: Accommodation of PP within ABS after WEEE Plastics Imperfect Sorting

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1439
Author(s):  
Charles Signoret ◽  
Pierre Girard ◽  
Agathe Le Guen ◽  
Anne-Sophie Caro-Bretelle ◽  
José-Marie Lopez-Cuesta ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Design Of Experiments ◽  
Tensile Properties ◽  
Response Surface ◽  
Impact Resistance ◽  
Average Diameter ◽  
Contamination Rate ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw

With the development of dark polymers for industrial sorting technologies, economically profitable recycling of plastics from Waste Electrical and Electronical Equipment (WEEE) can be envisaged even in the presence of residual impurities. In ABS extracted from WEEE, PP is expected to be the more detrimental because of its important lack of compatibility. Hence, PP was incorporated to ABS at different rates (2 to 8 wt%) with a twin-screw extruder. PP was shown to exhibit a nodular morphology with an average diameter around 1–2 µm. Tensile properties were importantly diminished beyond 4 wt% but impact resistance was decreased even at 2 wt%. Both properties were strongly reduced as function of the contamination rate. Various potential compatibilizers for the ABS + 4 wt% PP system were evaluated: PPH-g-MA, PPC-g-MA, ABS-g-MA, TPE-g-MA, SEBS and PP-g-SAN. SEBS was found the most promising, leading to diminution of nodule sizes and also acting as an impact modifier. Finally, a Design Of Experiments using the Response Surface Methodology (DOE-RSM) was applied to visualize the impacts and interactions of extrusion temperature and screw speed on impact resistance of compatibilized and uncompatibilized ABS + 4 wt% PP systems. Resilience improvements were obtained for the uncompatibilized system and interactions between extrusion parameters and compatibilizers were noticed.

scholarly journals MgO-Lignin Dual Phase Filler as an Effective Modifier of Polyethylene Film Properties

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 809 ◽  
Author(s):  
Karol Bula ◽  
Grzegorz Kubicki ◽  
Teofil Jesionowski ◽  
Łukasz Klapiszewski
Keyword(s):  
Lignin Content ◽  
Mechanical Tests ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Screw Extruder ◽  
Hybrid Filler ◽  
Tear Strength ◽  
Twin Screw ◽  
Time Required ◽  
Almost All

Functional magnesium oxide-lignin hybrid materials were obtained via mechanical grinding. Their particle shape and size as well as physicochemical properties were characterized. MgO-lignin materials with biocomponent content (between 20% and 80% amount of total weight of filler) were used as a partially bio-structured modifier of low density polyethylene. The composites with 5% by weight of dual fillers and polyethylene grafted with maleic anhydride were compounded in a twin screw extruder working in co-rotating mode. The prepared blends were cast extruded using a single screw extruder and laboratory cast line. The properties of the obtained films were verified in case of their weldability. The seal strength as well as shear test and tear strength of the welded sheets were examined. The results showed that the shortest equivalent time required to perform correct weld occurred in the system, where the highest amount of lignin was used in hybrid filler MgO-L (1:5 w/w). From mechanical tests of welds, a sharp increase in ultimate seal force was noticed for almost all compositions with lignin, especially where MgO was coupled with a high lignin content. For those composition seal open force raised up to 37.0 N, from the value of 23.6 N, achieved for neat low density polyethylene (LDPE). Tear strength of weld sheets confirmed once more that LDPE composition with MgO-L (1:5 w/w) achieved the highest ultimate force with its value of 71.5 N, and it was ~20.0 N higher than in the case of neat LDPE.

Reactive Compatibilization of Polylactide, Thermoplastic Starch and Poly(butylene adipate-co-terephthalate) Biodegradable Ternary Blend Films

2011 ◽  
Vol 695 ◽  
pp. 178-181 ◽  
Author(s):  
Worasak Phetwarotai ◽  
Duangdao Aht-Ong
Keyword(s):  
Tensile Properties ◽  
Thermoplastic Starch ◽  
Interfacial Interaction ◽  
Ternary Blend ◽  
Screw Extruder ◽  
Reactive Compatibilization ◽  
Blend Films ◽  
Reactive Modification ◽  
Twin Screw ◽  
Methylenediphenyl Diisocyanate

Biodegradable blend films of polylactide (PLA), thermoplastic starch (TPS), and poly(butylene adipate-co-terephthalate) (PBAT) were prepared through reactive modification. Three types of compatibilizers, methylenediphenyl diisocyanate (MDI), maleic anhydride (MA), and MA-g-PE, were studied. PLA and PBAT were blended in the presence of the compatibilizer to improve and evaluate the interfacial interaction. PBAT content was varied from 0 to 20 wt%, while compatibilizer content was differed from 0 to 5 wt% based on PBAT amount. For ternary blending, PLA, TPS, and PBAT were melt-blended with and without compatibilizer in a twin screw extruder using glycerol and tapioca starch as plasticizer and filler, respectively. The effects of type and content of compatibilizer and blend compositions on the physical, thermal, morphological, and tensile properties of the films were investigated. The results showed that the blend films with MDI had appropriate physical, thermal, and tensile properties. The presence of small amount of MDI enhanced the thermal and tensile properties of the films compared to the uncompatibilized films. This can be explained by a uniform morphology of the dispersed phase in the PLA matrix.

Tensile Properties and Degradability of Polyvinyl Alcohol and Starch Succinate Blend

2015 ◽  
Vol 1113 ◽  
pp. 122-126
Author(s):  
Mohd Muizz Fahimi bin Mohamed ◽  
Rahmah Mohamed
Keyword(s):  
Polyvinyl Alcohol ◽  
Tensile Properties ◽  
Sun Exposure ◽  
Melt Flow Index ◽  
Visual Observation ◽  
Flow Index ◽  
Screw Extruder ◽  
Soil Burial ◽  
Twin Screw ◽  
Flow Modifier

The purpose of this study was to determine the tensile properties of biodegradable Polyvinyl Alcohol (PVA) impregnated with commercial grade starch succinate (SS). PVA is a hydrophilic and hygroscopic polymer, and inclusion of SS reduces PVA's hygroscopicity and hydrophilicity. The compounding of PVA with SS was prepared by using a twin screw extruder with fixed flow modifier. The ratios of SS were varied between 5% to 20%. Melt flow index, tensile properties, soil burial and sun exposure degradability were investigated in this study. Tensile strength was observed to increase proportionate to the amount of SS incorporated while the blends were found to have greater flexibility as their elongation increases as their modulus dropped. SS was found to have greater flexibility chain which imparted greater elongation during stretching test. Higher content of SS was found to impart better degradation rate as derived from visual observation of the samples exposed to sunlight and soil burial.

Sign in / Sign up

Export Citation Format

Share Document