Degradation behaviors, thermostability and mechanical properties of poly (ethylene terephthalate)/polylactic acid blends

被引：22

作者：

Xia Xue-lian ^{[1
]}

Liu Wen-tao ^{[1
,2
]}

Tang Xin-ying ^{[1
]}

Shi Xiang-yang ^{[3
]}

Wang Li-na ^{[1
,4
]}

He Su-qin ^{[1
]}

Zhu Cheng-shen ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450052, Peoples R China

[2] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea

[3] Cit Heavy Ind Co LTD, Dept Qual Assurance, Luoyang 471039, Peoples R China

[4] Henan Inst Engn, Dept Mat & Chem Engn, Zhengzhou 450007, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2014年 / 21卷 / 05期

关键词：

degradation; polyester; polylactic acid; mechanical property; NONISOTHERMAL CRYSTALLIZATION BEHAVIOR; POLY(LACTIC ACID); POLY(ETHYLENE GLYCOL); MOLECULAR-WEIGHT; PLA; COPOLYMERS; POLYANHYDRIDES; MORPHOLOGY; STABILITY; RELEASE;

D O I：

10.1007/s11771-014-2116-z

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

It is difficult for polyethylene terephthalate (PET) to degrade, which caused severe pollution. In this work, polylactic acid (PLA) was introduced to improve the degradation of PET. PET/PLA was synthesized by extrusion blending. The thermal, crystalline and mechanical properties of blends were investigated with TGA, DSC, WAXD and universal testing machine. The degradation of the blends in soil, acid and alkaline buffer solutions was assessed, respectively. It was found that the introduction of a little PLA promoted crystallization of PET during injection molding process. The starting decomposition temperature lowered from 412.1 A degrees C of pure PET to 330.4 A degrees C at 50% PLA content, tensile and bending strength of blends gradually decreased with the PLA content increasing, while the degradation rate improved. Alkaline environment was most beneficial for blends to degrade. The degradation mechanism was discussed.

引用

页码：1725 / 1732

页数：8

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