Role of high-density polyethylene in the crystallization behaviors, rheological property, and supercritical CO2 foaming of poly (lactic acid)

Poly lactic acid (PLA) and High density polyethylene (HDPE) have been blended in a Brabender plastograph in the molten state. The melt die swell of the blends has been studied by using a capillary rheometer. Effects of the capillary dimensions, shear stress, shear rate, temperature and blending ratio on die swell of PLA/HDPE blend melts were investigated. The results showed that die swell ratio decreased with increasing of capillary length and temperature while it increased with increasing of shear stress, shear rate and capillary diameter. It was also found that the plots of die swell versus blending ratio go through a maximum for blending ratio PLA/HDPE (60/40).

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Role of maleic- anhydride-grafted- polypropylene in supercritical CO2 foaming of poly (lactic acid) and its effect on cellular morphology

Journal of Cellular Plastics ◽

10.1177/0021955x14539526 ◽

2014 ◽

Vol 52 (1) ◽

pp. 37-56 ◽

Cited By ~ 13

Author(s):

Xiangdong Wang ◽

Wei Liu ◽

Hangquan Li ◽

Zhongjie Du ◽

Chen Zhang

Keyword(s):

Lactic Acid ◽

Maleic Anhydride ◽

Supercritical Co2 ◽

Cellular Morphology ◽

Poly Lactic Acid

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Nonisothermal melt and cold crystallization behaviors of biodegradable poly(lactic acid)/Ti3C2Tx MXene nanocomposites

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-020-10502-7 ◽

2021 ◽

Author(s):

Qian Zhao ◽

Bowen Wang ◽

Chenyuan Qin ◽

Qiuxuan Li ◽

Chuntai Liu ◽

...

Keyword(s):

Lactic Acid ◽

Cold Crystallization ◽

Poly Lactic Acid ◽

Crystallization Behaviors ◽

Biodegradable Poly

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Biocomposites of Epoxidized Natural Rubber/Poly(lactic acid) Modified with Natural Fillers (Part I)

International Journal of Molecular Sciences ◽

10.3390/ijms22063150 ◽

2021 ◽

Vol 22 (6) ◽

pp. 3150

Author(s):

Anna Masek ◽

Stefan Cichosz ◽

Małgorzata Piotrowska

Keyword(s):

Tensile Strength ◽

Lactic Acid ◽

Natural Rubber ◽

Epoxidized Natural Rubber ◽

Poly Lactic Acid ◽

Uv Aging ◽

High Elasticity ◽

Natural Fillers ◽

Natural Additives

The study aimed to prepare sustainable and degradable elastic blends of epoxidized natural rubber (ENR) with poly(lactic acid) (PLA) that were reinforced with flax fiber (FF) and montmorillonite (MMT), simultaneously filling the gap in the literature regarding the PLA-containing polymer blends filled with natural additives. The performed study reveals that FF incorporation into ENR/PLA blend may cause a significant improvement in tensile strength from (10 ± 1) MPa for the reference material to (19 ± 2) MPa for the fibers-filled blend. Additionally, it was found that MMT employment in the role of the filler might contribute to ENR/PLA plasticization and considerably promote the blend elongation up to 600%. This proves the successful creation of the unique and eco-friendly PLA-containing polymer blend exhibiting high elasticity. Moreover, thanks to the performed accelerated thermo-oxidative and ultraviolet (UV) aging, it was established that MMT incorporation may delay the degradation of ENR/PLA blends under the abovementioned conditions. Additionally, mold tests revealed that plant-derived fiber addition might highly enhance the ENR/PLA blend’s biodeterioration potential enabling faster and more efficient growth of microorganisms. Therefore, materials presented in this research may become competitive and eco-friendly alternatives to commonly utilized petro-based polymeric products.

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