Mechanical Properties of PLA/LLDPE Films Reinforced with Silica from Rice Husk

2014 ◽  
Vol 1025-1026 ◽  
pp. 221-226 ◽  
Author(s):  
Supavinee Sareeladdanon ◽  
Pranut Potiyaraj
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Tensile Testing ◽  
Tensile Modulus ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Elongation At Break ◽  
Rice Husk Silica ◽  
Result Show ◽  
Twin Screw

Nanocomposite is one of the most favorable approaches to improve mechanical properties of polymers. This study prepared polymer composite of PLA and LLDPE with different amount of rice husk silica (0.5 and 1 wt%). The composites were prepared by melt-mixing in a twin-screw extruder and processed into film by a chill roll cast extruder. The mechanical properties were investigated through tensile testing and tear testing. The result show that the tensile modulus of PLA decreased with 1wt% rice husk silica. Similarly, tensile modulus of LLDPE dropped with the addition of silica. However, with the addition 0.5 and 1 wt% rice husk silica, the elongation at break of PLA and LLDPE composites increases significantly.

Effect of Compatibilizer Content on the Mechanical and Morphological Properties of PET/PP (70/30) Blends

2015 ◽  
Vol 735 ◽  
pp. 70-74
Author(s):  
Ibrahim Mohammed Inuwa ◽  
Azman Hassan ◽  
Sani Amril Samsudin
Keyword(s):  
Mechanical Properties ◽  
Triblock Copolymer ◽  
Standard Test ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Young’S Moduli ◽  
Morphological Studies ◽  
Twin Screw ◽  
Pp Blends

This work investigates the effect of compatibilizer concentration on the mechanical properties of compatibilized polyethylene terephthalate (PET) /polypropylene (PP) blends. A blend containing 70 % (wt) PET, 30 % (wt) PP and 5 - 15 phr compatibilizers were compounded using counter rotating twin screw extruder and fabricated into standard test samples using injection molding. The compatibilizer used is styrene-ethylene-butylene-styrene grafted maleic anhydride triblock copolymer (SEBS-g-MAH). Morphological studies show that the particle size of the dispersed PP phase is dependent on the compatibilizer content up to 10 phr. Impact strength and elongation at break showed maximum values with the addition of 10 phr SEBS-g-MAH and a corresponding decrease in flexural and young’s moduli; and strengths.. Overall the mechanical properties of PET/PP blends depend on the control of the morphology of the blend and can be achieved by effective compatibilization using 10 phr SEBS-g-MAH.

Mechanical and Interfacial Properties of Hydrolyzed Kevlar Fiber Reinforced Wood Flour/HDPE Composites

2011 ◽  
Vol 221 ◽  
pp. 27-31 ◽  
Author(s):  
Rong Xian Ou ◽  
Qing Wen Wang ◽  
Fei Pin Yuan ◽  
Bao Yu Liu ◽  
Wei Jun Yang
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Screw Extruder ◽  
Kevlar Fiber ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Twin Screw ◽  
Matrix Morphology

Hydrolyzed Kevlar fibers (KFs) were compouded into high-density polyethylene (HDPE) with wood flour (WF) by twin-screw/single-screw extruder to investigate the reinforcement effects of KFs on the mechanical properties of conventional WF/HDPE composites. Maleated HDPE (MAPE) was used as a compatibilizer. The mechanical properties significantly improved as the KFs loading increases in the presence of 4% MAPE, such as tensile strength 14.7%, tensile modulus 12.4%, flexural strength 22.2%, flexural modulus 22.4%, and impact strength 41.7% with 2 wt.% KFs compared to WF/HDPE composite with MAPE. The fiber matrix morphology of the interface region in the composites was examined using scanning electron microscopy (SEM).

Compatibilization Effect of Polyfunctional Monomers on PP/TPU Blends

2011 ◽  
Vol 322 ◽  
pp. 394-397 ◽  
Author(s):  
Lan Fang Guan ◽  
Jin Zhou Chen
Keyword(s):  
Mechanical Properties ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Polyfunctional Monomer ◽  
Trimethylolpropane Triacrylate ◽  
Twin Screw ◽  
Compatibilization Effect

This paper mainly researched how polyfunctional monomers affect the Compatibilization of PP/TPU blends. With triallylisocyanurate (TAIC) and trimethylolpropane triacrylate (TMPTA) which belong to polyfunctional monomers as compatibilizers, various PP/TPU blends were prepared via melt mixing by using a twin-screw extruder. It is investigated that the effect of polyfunctional monomer on the mechanical properties, morphology and melt flowing behavior of the blends. The results show that the compatibility of PP/TPU is improved by adding moderate TAIC or TMPTA, and the compatibilization effect of TMPTA is superior to TAIC, especially when the content of monomers is 3 phr.

Γ-Radiation Effect Research of PP/TMPTA/TPU Blends

2012 ◽  
Vol 562-564 ◽  
pp. 23-26
Author(s):  
Lan Fang Guan ◽  
Jin Zhou Chen
Keyword(s):  
Mechanical Properties ◽  
Radiation Dose ◽  
Radiation Effect ◽  
Dynamic Mechanical Properties ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Γ Radiation ◽  
Trimethylolpropane Triacrylate ◽  
Twin Screw ◽  
Compatibilization Effect

This paper mainly researches the compatibilization effect of γ-radiation on PP/TMPTA/TPU blends. With trimethylolpropane triacrylate (TMPTA) as compatibilizer, different ratio PP/TMPTA/TPU blends are prepared via melt mixing by using a twin-screw extruder, and then the blends are irradiated(radiation dose≤25kGy) by 60Co-γ radiation source in different atmospheres. The effect of γ-radiation on the mechanical properties, dynamic mechanical properties and morphology of the blends is investigated. The results show that the compatibility of PP/TMPTA/TPU is improved by moderate dose γ-radiation (especially when radiation dose is 25kGy in air and 10kGy in vacuum), and γ-radiation functions similarly in the improvement of mechanical properties of the blends in the two atmospheres.

Tensile Mechanical Properties of Wood Fiber / PVC Composites

2011 ◽  
Vol 328-330 ◽  
pp. 1512-1516 ◽  
Author(s):  
Jie Li Duan ◽  
En Chen Jiang ◽  
Yu Hua Lu
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Rice Husk ◽  
Wood Fiber ◽  
Tensile Modulus ◽  
Elongation At Break

The influencing effects of the content of wood fiber, particle size and content of titanate coupler on the tensile properties of wood fiber (include the pine powder and the rice husk powder )/PVC composites (WPC) were investigated. The results showed that the tensile modulus of WPC are increased, the tensile strength and the elongation at break of WPC are decreased slightly when the wood fiber changed from 30 to 60( phr method) . Between 150μm and 165μm in the size of the diameter, the tensile strength of WPC increased by 11.5%, however it is increased by 5% between 165μm and 315μm. The content of titanate coupler affected significantly, the tensile properties of WPC appeared first increased and then decreased when the content of titanate coupler is increased from 0 to 3.5 shares( phr method). Added the same content of pine powder or rice husk powder, the tensile modulus and the tensile strength of WPC which filled pine powder are bigger, but the elongation at break of WPC which filled rice husk powder are bigger.

scholarly journals Preparation of Biodegradable Materials by Reactive Extrusion

2008 ◽  
Vol 587-588 ◽  
pp. 520-524 ◽  
Author(s):  
Isabel Moura ◽  
Ana Vera Machado ◽  
Fernando M. Duarte ◽  
Gabriela Botelho ◽  
Regina Nogueira
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Young Modulus ◽  
Polymeric Materials ◽  
Reactive Extrusion ◽  
Biodegradable Materials ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Twin Screw ◽  
Poly Caprolactone

This work aimed to prepare biodegradable polymeric materials based on blends of a synthetic high density polyethylene (HDPE) and biodegradable polymers such as polylactic acid (PCL) and poly(caprolactone) (PLA), in a co-rotating twin-screw extruder. A polyethylene modified with maleic anhydride was used as compatibiliser. The mechanical results showed that the addition of PLA improves the blends stiffness while the addition of PCL leads to materials with a greater elongation at break and a lower Young modulus. This feature is related with the mechanical properties of each material as well as the adhesion between them. Concerning the biodegradability tests, it was found that HDPE/PCL blend presents the highest degree of biodegradability.

Preparation of PLLA/OMMT Composite and its Properties

2011 ◽  
Vol 380 ◽  
pp. 265-269
Author(s):  
Rui Xia Duan ◽  
Ming Jun Niu ◽  
Kai Guo ◽  
Jin Zhou Chen ◽  
Li Yan Sui ◽  
...  
Keyword(s):  
Flow Rate ◽  
Bending Strength ◽  
Melt Flow ◽  
X Ray Diffraction ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Melt Flow Rate ◽  
Elongation At Break ◽  
Twin Screw ◽  
Thermal Stability Of

Poly(L-lactic acid ) (PLLA) /oganic montmorillonite (OMMT) composites were prepared by means of melt-mixing using a twin-screw extruder. The mechanical properties and melt flow rate of the composites were investigated, and their crystallization structure and thermal properties were characterized by X-Ray Diffraction (XRD), Differential Scanning Calorimeter (DSC), and thermogravimetric analysis (TG). It was shown that the tensile strength, elongation at break and bending strength of the PLLA/OMMT composites firstly increased and then reduced along with the increase of the content of OMMT. The melt flow rate of the composites was obviously improved and the crystallinity was increased. OMMT played a heterogeneous nucleation role in the composites, while it had little impact on thermal stability of the composites.

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.

Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties

Holzforschung ◽  
2015 ◽  
Vol 69 (3) ◽  
pp. 313-319 ◽  
Author(s):  
Haroutioun Askanian ◽  
Vincent Verney ◽  
Sophie Commereuc ◽  
René Guyonnet ◽  
Valérie Massardier
Keyword(s):  
Viscoelastic Behavior ◽  
Tensile Modulus ◽  
Young Modulus ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Polypropylene Composites ◽  
Twin Screw ◽  
Composites Processing

Abstract Composites have been prepared with polypropylene (PP) as a matrix and pine flours, either thermally treated (Wtr) or not (W), as fillers resulting in wood plastic composites (WPCs). The treatment by retification at 280° mainly elevates the hydrophobicity of wood. The WPCs were fabricated with a co-rotating twin-screw extruder with the screw speeds of 500 and 1200 rpm and specimens were prepared by injection molding. Viscoelastic behavior, tensile test and Charpy impact test of Wtr PC were compared with PP and WPC. Wtr PC has a better dispersion and highest tensile modulus. As expected, a decrease in elongation at break and impact strength was observed for all composites. Processing at 1200 rpm improved by 60% the Young modulus of the WPC compared to 500 rpm, whereas 500 rpm was enough to obtain the highest modulus for Wtr PC.

Rubber toughened flame retardant (FR) polyamide 11 nanocomposites Part 1: the effect of SEBS-g-MA elastomer and nanoclay

2018 ◽  
Vol 1 (1) ◽  
pp. 25-38 ◽  
Author(s):  
Hao Wu ◽  
Rogelio Ortiz ◽  
Joseph H. Koo
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Tensile Modulus ◽  
Twin Screw Extrusion ◽  
Elongation At Break ◽  
Polyamide 11 ◽  
Release Capacity ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Heat Release Capacity

Abstract The objective of this research is to develop a multifunctional polyamide 11 (PA11) with balanced thermal, mechanical, and flammability properties for SLS. In this study, two sets of formulations were prepared by twin-screw extrusion: the first set examined the effect of maleic anhydride modified elastomers on flammability and the mechanical properties, whereas the second set added various amount of nanoclay and discussed thermal stability, flammability and mechanical properties. The addition of 20 wt.% elastomer brought the elongation at break up to 40%. Reduction in heat release capacity as high as 49% was achieved, all nanocomposite samples passed UL 94 V-1 rating. The addition of nanoclay improved the tensile modulus by up to 78%, the elongation at break for all the formulations were negatively affected by the addition of flame retardant and nanoclay.

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