Novel biodegradable low-density polyethylene-poly(lactic acid)-starch ternary blends

被引：15
|
作者：
Aleksanyan, Kristine V. [1 ]
Rogovina, Svetlana Z. [1 ]
Ivanushkina, Natalya E. [2 ]
机构：
[1] Russian Acad Sci, Semenov Fed Res Ctr Chem Phys, Dept Polymers & Composite Mat, Kosygina St 4, Moscow 119991, Russia
[2] Russian Acad Sci, Skryabin Inst Biochem & Physiol Microorganisms, Dept All Russian Collect Microorganisms, Pushchino, Moscow Oblast, Russia
来源：
POLYMER ENGINEERING AND SCIENCE | 2021年 / 61卷 / 03期
关键词：
biodegradable; mixing; polyethylene; polysaccharides; THERMAL-DEGRADATION; PLASTIC-DEFORMATION; STARCH; COMPOSITES; POLYMERS; ACID); POLYLACTIDE; MORPHOLOGY; KINETICS;
D O I：
10.1002/pen.25624
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The ternary powder blends based on low-density polyethylene (LDPE) and two polymers of natural origin poly(lactic acid) (PLA) and starch are obtained in a rotor disperser under conditions of shear deformations. The dependence of the final powder dispersity on the composition is explored. A comparative analysis of the mechanical properties of the ternary blends with those of the LDPE-PLA and PLA-starch binary blends previously obtained has revealed that the presence of two rigid polymers PLA and starch leads to an increase in the elastic modulus and a decrease in the tensile strength and elongation at break. In the study of the blend biodegradability, it is found that the presence of two polymers of natural origin in the system with a total mass fraction of 60% promotes intensive biodegradation.
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页码：802 / 809
页数：8
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