Preparation of tough, high modulus, and creep-resistant PS/SIS/halloysite blend nanocomposites

2020 ◽  
Vol 33 (8) ◽  
pp. 1125-1144
Author(s):  
Emre Tekay
Keyword(s):  
Impact Strength ◽  
Room Temperature ◽  
Permanent Deformation ◽  
Tensile Modulus ◽  
High Modulus ◽  
Melt Mixing ◽  
Halloysite Nanotube ◽  
Melt Compounding ◽  
Mixing Method ◽  
Blend Nanocomposites

In this work, polystyrene (PS)/poly(styrene-b-isoprene-b-styrene) (SIS)/organophilic halloysite nanotube (Org-HNT) blend nanocomposites were produced by melt compounding technique. The significant improvements in both toughness and impact strength values were obtained in PS/SIS blends containing 20%, 30%, and 40% SIS elastomer as compared to neat PS. Among them, PS-30SIS blend with a co-continuous morphology exhibited moderate tensile and impact properties and its nanocomposites having 3, 5, 7 and 10 phr Org-HNT were prepared through the melt mixing method. All the nanocomposites exhibited continuous/fibrillar morphologies with smaller elastomer domains and higher tensile modulus and toughness as compared to PS-30SIS blend. Among them, the nanocomposite having 7 phr Org-HNT and 30% SIS phase (7H-30SIS) exhibited the highest impact strength with enhanced tensile properties. The same nanocomposite exhibited about 21% and 100% increments in the modulus and toughness in comparison to its blend, respectively. The 7H-30SIS nanocomposite increased storage moduli of PS-30SIS blend at glass transition regions of both polyisoprene and PS phases and also at room temperature. Moreover, the rubbery storage moduli of the nanocomposites were found to be about 37% and 53% higher for 7 and 10 phr Org-HNT loaded nanocomposites, respectively, in comparison with that of PS-30SIS blend. The creep deformation and permanent deformation of the blend both decreased via introduction of the nanotubes which is in agreement with aforementioned improvements in the stiffness.

Mechanical Property Improvement of Poly(Butylene Succinate) by Reinforcing with Modified Fumed Silica

2014 ◽  
Vol 1025-1026 ◽  
pp. 215-220 ◽  
Author(s):  
Sasirada Weerasunthorn ◽  
Pranut Potiyaraj
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Flexural Strength ◽  
Fumed Silica ◽  
Tensile Modulus ◽  
Silica Particles ◽  
Melt Mixing ◽  
Butylene Succinate ◽  
Ir Spectrophotometry

Fumed silica particles (SiO2) were directly added into poly (butylene succinate) (PBS) by melt mixing process. The effects of amount of fumed silica particles on mechanical properties of PBS/fumed silica composites, those are tensile strength, tensile modulus, impact strength as well as flexural strength, were investigated. It was found that the mechanical properties decreased with increasing fumed silica loading (0-3 wt%). In order to increase polymer-filler interaction, fumed silica was treated with 3-glycidyloxypropyl trimethoxysilane (GPMS), and its structure was analyzed by FT-IR spectrophotometry. The PBS/modified was found to possess better tensile strength, tensile modulus, impact strength and flexural strength that those of PBS/fumed silica composites.

scholarly journals Morphological, Thermal and Mechanical Properties of 90/10 (WT %/WT %) PP/ABS Blends and their Polymer Nanocomposites

2017 ◽  
Vol 26 (6) ◽  
pp. 096369351702600 ◽  
Author(s):  
Pravin R. Kubade ◽  
Pankaj Tambe ◽  
Hrushikesh B. Kulkarni
Keyword(s):  
Impact Strength ◽  
Tensile Modulus ◽  
Acrylonitrile Butadiene Styrene ◽  
Halloysite Nanotubes ◽  
Thermal And Mechanical Properties ◽  
Melt Mixing ◽  
Uniform Dispersion ◽  
Selective Localization ◽  
Droplet Morphology ◽  
Butadiene Styrene

Halloysite nanotubes (HNTs) are modified successfully using polyethyleneimine (PEI). The HNTs and HNTs modified using PEI filled 90/10 (wt/wt) polypropylene (PP) and acrylonitrile butadiene styrene (ABS) blends and its nanocomposites are prepared by melt mixing technique in presence of dual compatibilizer. Droplet morphology is refined in matrix as well as selective localization of HNTs modified using PEI shows increase in crystallinity of PP phase and formation of β-form of PP crystals. Uniform dispersion of HNTs modified using PEI in PP resulted in improvement in impact strength, tensile modulus and thermal stability. The enhancement in tensile strength, tensile modulus, and impact strength for 1 wt% of HNTs modified using PEI filled 90/10 (wt/wt) PP/ABS blends with dual compatibilizer are 14.9, 20 and 15%, respectively.

Effect of mixing conditions on the selective localization of graphite oxide and the properties of polyethylene/high-impact polystyrene/graphite oxide nanocomposite blends

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 77723-77733 ◽  
Author(s):  
Mahmood Amani ◽  
Mehdi Sharif ◽  
Amir Kashkooli ◽  
Nima Rahnama ◽  
Ali Fazli
Keyword(s):  
Graphite Oxide ◽  
High Impact ◽  
Effective Strategy ◽  
Mixing Conditions ◽  
Melt Mixing ◽  
Solution Intercalation ◽  
High Impact Polystyrene ◽  
Mixing Method ◽  
Selective Localization ◽  
Blend Nanocomposites

We develop here a new and effective strategy for compatibilizing immiscible polymer blend nanocomposites of polyethylene/high impact polystyrene/graphite oxide (PE/HIPS/GO) by combination of solution intercalation and melt mixing method.

Study on thermal and mechanical behaviors of polypropylene grade 552R/Cloisite 15A nanocomposites suitable for yarn applications

2021 ◽  
pp. 096739112110034
Author(s):  
Ali Farahani ◽  
Arsalan Parvareh ◽  
Mostafa Keshavarz Moraveji ◽  
Davood Soudbar
Keyword(s):  
Melt Spinning ◽  
Oxygen Index ◽  
Layer Structure ◽  
Tensile Modulus ◽  
Barrier Properties ◽  
Nucleating Agent ◽  
Clay Nanocomposites ◽  
Melt Mixing ◽  
Limiting Oxygen Index ◽  
Mixing Method

The investigation of polypropylene (PP)/clay nanocomposites has received considerable scientific and technological attention during the last decades due to their good mechanical and barrier properties. In the present article, the effects of adding Cloisite15A (C15A) nanoclay in polypropylene (PP) were investigated. PP nanocomposites were prepared by a direct melt mixing method. For better dispersion of C15A, 30 wt% of nanoclay masterbatch was first prepared by melt mixing of PP matrix and acrylic acid grafted PP oligomer (PP- g-AA) in a compounder, before being used to produce nanocomposites with 2 and 5 wt% of C15A. The aim of this work was to used nanoclay filled nanocomposites with suitable properties for cable application like good flame-retardant property; improve dye-ability and resilience of polypropylene. The XRD results indicated an intercalated layer structure for nanocomposites, The SEM examination showed satisfactory dispersion of nanoclay in 2 wt% of C15A and some degree of agglomeration in 5 wt% of C15A. DSC analysis indicated that C15A acts as a nucleating agent and increases crystallinity in the nanocomposite. TGA showed with increasing nanoclay, heat resistance was improved and degradation temperatures increased. Limiting oxygen index (LOI) tests showed increased flame retardancy from 25% for neat polypropylene t0 32.2% for nanocomposites of 5 wt% of C15A. The tensile modulus was improved from 423 MPa for neat polypropylene to 474 MPa for nanocomposites with 5 wt% of C15A. This result indicates that increasing C15A content had a suitable effect on the tensile properties. Melt spinning investigation on low oriented yarn (LOY), draw textured yarn (DTY), and fully drawn yarn (FDY) of 2 wt% C15A nanocomposite showed a reduction of linear density for FDY and an increase of the shrinkage. Furthermore, the obtained results for the improvement of dye-ability and compression resilience showed that PP/C15A is appropriate for textile products.

Preparation and Characterization of PP/Organoclay Nanocomposites with Maleic-Anhydride

2007 ◽  
Vol 119 ◽  
pp. 203-206
Author(s):  
Hyung Min Lee ◽  
B.J. Park ◽  
In Joo Chin ◽  
Hyo Kyoung Kim ◽  
Won Gu Kang ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Small Strain ◽  
X Ray Diffraction ◽  
Melt Mixing ◽  
Structural Investigations ◽  
Melt Compounding ◽  
Transmission Electron ◽  
Twin Screw ◽  
Linear Viscoelastic ◽  
Mixing Method

Polypropylene (PP)/organoclay nanocomposites were prepared via a melt-mixing method through two-step melt compounding using a co-rotating intermeshing twin screw extruder. Maleic anhydride grafted polypropylene (PP-g-MA) was adopted during compounding as a compatibilizer. Structural investigations via X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed the intercalated morphology of the nanocomposites. The use of PP-g-MA led to not only good clay dispersion but also heterogeneous intercalation. Thermal degradation of the PP nanocomposites was studied by thermogravimetric analysis (TGA). Rheological properties of the PP/organoclay nanocomposites were also investigated via a rotational rheometer in which linear viscoelastic measurements were performed in oscillatory shear with small strain amplitude. Storage (G’) and loss (G”) moduli were found to be increased at all frequencies with increasing clay contents.

scholarly journals Infl uence of Na+-montmorillonite modifi ed with acrylamide on the structure and properties of polypropylene

2020 ◽  
pp. 26-29
Author(s):  
M. B. Begieva ◽  
D. B. Amshokova ◽  
L. R. Pashtova ◽  
R. CH. Bazheva ◽  
A. M. Kharaev
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Modulus Of Elasticity ◽  
Large Scale ◽  
Tensile Modulus ◽  
Physical And Mechanical Properties ◽  
Scale Production ◽  
Melt Mixing ◽  
Twin Screw ◽  
Sodium Form

Sodium form montmorillonite was obtained from natural clay from the Gerpegezh deposit (Kabardino-Balkarian Republic, Russia). A procedure has been developed for modifying the sodium form of montmorillonite using acrylamide. The structure of the organoclay was confi rmed by IR spectroscopy. Composites based on polypropylene and modifi ed montmorillonite are obtained by melt mixing on a twin-screw extruder from JiangsuXindaScience & Technology. The structure of the obtained composites was investigated using X-ray diff raction analysis and scanning electron microscopy. The results of testing the obtained composites, which were used to evaluate the physical and mechanical properties, are presented: the melt fl ow index, impact strength according to Izod, modulus of elasticity, ultimate strength and elongation at break. ICompared to unfi lled polypropylene, polymer composites with 3 wt.% organoclay are shown to increase: impact strength by 31.61% (without notch) and 12.8% (with notch of 5 mm); modulus of elasticity in bending by 8.3%; tensile modulus by 10,3%. When polypropylene is fi lled with 5 wt.% organoclay, the composites show increased: impact strength by 12.60% (without notch) and by 10.52% (with an notch of 5 mm); the modulus of elasticity in bending and tension are the same as in the previous case. A further increase in the content of organoclay to 7 wt.% leads to a slight decrease in mechanical properties. Acrylamide can be used as a modifi er of organic clay; it is easily accessible and cheap, used in large-scale production. The resulting composites can be used as structural materials.

scholarly journals Mechanical Properties of Polypropylene (PP) – Montmorillonite (MMT) Nanocomposites for Pre-Fabricated Vertical Drain (PVD) Application

2018 ◽  
Vol 7 (4.35) ◽  
pp. 689
Author(s):  
N.A. Selamat ◽  
M.N. M.Ansari ◽  
Zainudin Yahya ◽  
Ragunatha E.Naicker
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Tensile Modulus ◽  
Injection Pressure ◽  
Optimum Process ◽  
Melt Mixing ◽  
Melt Temperature ◽  
Injection Speed ◽  
Molding Method ◽  
Vertical Drain

Polypropylene (PP) – montmorillonite (MMT) blends were prepared by melt-mixing method followed by injection molding method. The optimum process melt-temperature was set at 1950C, the injection speed of 15cc/s, injection pressure of 30MPa and cooling time of 20 sec. was used for the sample preparation. Investigation shows, addition of MMT nanoparticles have improved the mechanical properties. The tensile test and impact test were conducted at room temperature and atmospheric pressure. The tensile modulus and yield strength improved with increasing MMT content, however, elongation at break was reduced as the MMT content was increased from 2wt% to 8wt%. The Izod impact strength is also affected by the addition of MMT content. Nanocomposites based on PP containing 8wt% of MMT showed higher impact strength than the other compositions and Neat PP (control). The influence of MMT content on impact strength increased with MMT content which is a significant result required for pre-fabricated vertical drain (PVD). Further investigations are required to study the mechanical properties of the PVD using PP – MMT nanocomposites to replace the existing material (PP).

scholarly journals Compression Molded Thermoplastic Composites Entirely Made of Recycled Materials

2019 ◽  
Vol 11 (3) ◽  
pp. 631 ◽  
Author(s):  
Petri Sormunen ◽  
Timo Kärki
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Tensile Modulus ◽  
Mineral Wool ◽  
Thermoplastic Composites ◽  
Filler Materials ◽  
Melt Mixing ◽  
Hot Melt ◽  
Composite Samples

Recycled post-consumer high-density polyethylene pipe plastic was agglomerated into composite samples with wood, glass fiber, mineral wool, gypsum, and soapstone as recycled particulate fillers. The tensile strength, tensile modulus, impact strength, and hardness were the mechanical properties evaluated. Scanning electron microscopy was performed on the broken surfaces of tensile strength samples to study the interfacial interactions between the composite matrix and the filler materials. Heat build-up, water absorption, and thickness swelling were the physical properties measured from the composites. The addition of particulate fillers demonstrated the weakening of the tensile and impact strength but significantly improved the rigidity of the post-consumer plastic. The composites filled with minerals had mechanical properties comparable to compression molded wood plastic composites but higher resistance to moisture. A lack of hot-melt mixing affected the mechanical properties adversely.

Tuning of nanotube/elastomer ratio for high damping/tough and creep resistant polypropylene/SEBS-g-MA/HNT blend nanocomposites

2018 ◽  
Vol 53 (8) ◽  
pp. 1005-1022 ◽  
Author(s):  
Emre Tekay ◽  
Nihan Nugay ◽  
Turgut Nugay ◽  
Sinan Şen
Keyword(s):  
Low Temperature ◽  
Dimensional Stability ◽  
Permanent Deformation ◽  
Short Term ◽  
Halloysite Nanotube ◽  
Wide Range ◽  
Poly Ethylene ◽  
Term Creep ◽  
Blend Nanocomposites ◽  
Short Term Creep

Polypropylene (PP)/maleic anhydride grafted polystyrene-b-poly (ethylene/butylene)-b-polystyrene (SEBS-g-MA)/organophilic halloysite nanotube clay ternary nanocomposites were produced by using HNT/SEBS-g-MA masterbatches at different nanotube loadings (1 wt%, 3 wt%, and 5 wt%). The masterbatches with different ratios of HNT/SEBS-g-MA (1/1, 1/2, and 1/3) were prepared via a revolution/rotation type mixing-assisted masterbatch process. All nanocomposites showed higher storage moduli and damping at low temperatures as compared to neat polypropylene. The nanocomposites having HNT/SEBS-g-MA ratio of 1/3 were found to act as effective dampers with their relatively higher damping values. In terms of short-term creep performance, 1 wt% and 3 wt% organophilic halloysite nanotube loaded systems with low amount of SEBS-g-MA (<9 wt%) enhanced dimensional stability of polypropylene with their lower creep strain and permanent deformation values. More specifically, among the nanocomposites, 3 wt% organophilic halloysite nanotube loaded nanocomposite with HNT/SEBS-g-MA ratio of 1/3 and co-continuous like morphology not only exhibited an effective damping over a wide range of temperature (from −70℃ to 50℃) but also showed relatively higher storage moduli at low temperature region together with lower permanent creep deformation as compared to neat polypropylene. As a result, the HNT/SEBS-g-MA masterbatch in 1/3 ratio was found to be the most suitable in polypropylene blend nanocomposites. It may be advantageous for polypropylene nanocomposite based applications where high damping/toughness at low temperature conditions and high dimensional stability under load are desired.

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

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