Influence of Polyolefin Elastomer Content on Morphology, Rheology and Thermal Behavior of Toughened Polylactic Acid/Polyolefin Elastomer Blends

In this study, different blends based on polylactic acid (PLA)/polyolefin elastomer (POE) and compatibilized PLA/POE was prepared by melt mixing. The compatibilizer glycidyl methacrylate-grafted-polyolefin elastomer (POE-g-GMA) was synthesized in a separate process. The Fourier transform infrared spectrum confirmed the reaction of POE and glycidyl methacrylate. Meanwhile, the morphology of dispersed phase was observed by scanning electron microscope. The results indicated that the compatibilizer has improved the compatibility and interfacial adhesion between PLA and POE phase. The rheological test results revealed that the introduction of compatibilizer could enhance the storage modulus and melt complex viscosity of PLA/POE blends. The foamability was studied in the presence of azodicarbonamide as a chemical blowing agent in the batch foaming process. Morphology of foams such as porous cell size, porous cell population density, and foam density were studied. It was found that the presence of POE in PLA foams has a great influence on their mechanical properties and the toughness. Addition of POE-g-GMA in samples increased elastic modulus of foams and decreased their strain at break.

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Thermal behavior and water absorption kinetics of polylactic acid/chitosan biocomposites

Iranian Polymer Journal ◽

10.1007/s13726-020-00879-5 ◽

2020 ◽

Author(s):

Nor Helya Iman Kamaludin ◽

Hanafi Ismail ◽

Arjulizan Rusli ◽

Sam Sung Ting

Keyword(s):

Thermal Behavior ◽

Water Absorption ◽

Polylactic Acid ◽

Absorption Kinetics ◽

Kinetics Of

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Effects of Lubricant and Toughening Agent on the Fluidity and Toughness of Poplar Powder-Reinforced Polylactic Acid 3D Printing Materials

Polymers ◽

10.3390/polym10090932 ◽

2018 ◽

Vol 10 (9) ◽

pp. 932 ◽

Cited By ~ 2

Author(s):

Qingfa Zhang ◽

Hongzhen Cai ◽

Andong Zhang ◽

Xiaona Lin ◽

Weiming Yi ◽

...

Keyword(s):

3D Printing ◽

Impact Strength ◽

Polylactic Acid ◽

Three Dimensional ◽

X Ray Diffraction ◽

Screw Extruder ◽

Melt Flow Rate ◽

Polyolefin Elastomer ◽

Twin Screw ◽

Toughening Agent

Three dimensional (3D) printing materials were manufactured with polylactic acid (PLA) and poplar powder using the twin screw extruder and 3D printing consumables extruder. Lubricant (TPW604) and toughening agent polyolefin elastomer (POE) were utilized to improve the fluidity and toughness of the materials. 3D printing materials were tested by infrared spectroscopy, X-ray diffraction, melt flow rate, rheology behavior, impact and scanning electron microscope. The results show that the poplar powder could decrease impact strength of PLA, the same as TPW604. Unlike poplar powder, TPW604 can improve the fluidity of 3D printing materials. And POE can fill the voids formed by poplar powder in PLA, enhance interface compatibility between poplar powder and PLA, and effectively improve the fluidity and impact strength of 3D printing materials.

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Effect of H bonds on thermal behavior and cohesion in polylactic acid nanocomposites and nitrogen-doped carbon nanotubes

Journal of Materials Science ◽

10.1007/s10853-019-04245-6 ◽

2019 ◽

Vol 55 (8) ◽

pp. 3354-3368 ◽

Cited By ~ 1

Author(s):

I. Montes-Zavala ◽

E. O. Castrejón-González ◽

G. Sánchez-Balderas ◽

E. Pérez ◽

J. A. González-Calderón

Keyword(s):

Carbon Nanotubes ◽

Thermal Behavior ◽

Polylactic Acid ◽

Nitrogen Doped ◽

Nitrogen Doped Carbon

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Influence of lignin on morphology, structure and thermal behavior of polylactic acid-based biocomposites

10.1063/1.4949708 ◽

2016 ◽

Author(s):

Maurizio Canetti ◽

Adriana Cacciamani ◽

Fabio Bertini

Keyword(s):

Thermal Behavior ◽

Polylactic Acid

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Preparation and Properties of Polylactic Acid/Modified Starch/POE Degradation Materials

MATEC Web of Conferences ◽

10.1051/matecconf/201823804009 ◽

2018 ◽

Vol 238 ◽

pp. 04009

Author(s):

Xiaobo Zhang

Keyword(s):

Tensile Strength ◽

Polylactic Acid ◽

Softening Point ◽

Modified Starch ◽

Melt Flow Rate ◽

Polyolefin Elastomer ◽

Alkaline Conditions ◽

Rate Of Hydrolysis ◽

Degradation Properties ◽

Degradation Time

Polylactic acid (PLA) / polyolefin elastomer (POE) / modified starch composites were prepared by melt blending. The composites were characterized by softening point, polarizing microscope, melt flow rate, tensile strength and degradation properties. The results showed that with the increase of modified starch and POE content, phase separation occurred between modified starch and PLA, and the tensile strength decreased compared with pure PLA. Modified starch could increase the crystallinity of PLA to increase the softening point and improve the thermal stability of PLA. When the modified starch and POE content were 15 and 20 parts respectively; the composite material has the best performance. At this time, the softening point was 75°C and the tensile strength could reach 47.7 MPa. The composite materials in different media showed the quality decreased with the prolongation of degradation time, especially in acidic and alkaline conditions, because the degradation rate of hydrolysis was accelerated.

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