Effect of UV Irradiation on the Structural and Dynamic Characteristics of Polylactide and Its Blends with Polyethylene

被引：16
|
作者：
Tertyshnaya, Yu. V. [1 ,2 ]
Podzorova, M. V. [2 ,3 ]
机构：
[1] Russian Acad Sciences, Emanuel Inst Biochem Phys, Moscow 119334, Russia
[2] Fed Res Agroengn Ctr VIM, Moscow 109428, Russia
[3] Plekhanov Russian Univ Econ, Moscow 117997, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2020年 / 14卷 / 01期
关键词：
polylactide; photodegradation; polymer blends; polyethylene; IR spectroscopy; UV irradiation; thermophysical characteristics; POLY(LACTIC ACID); DEGRADATION; FILMS; PLA; POLY(3-HYDROXYBUTYRATE); BIODEGRADATION; TEMPERATURE; FEATURES;
D O I：
10.1134/S1990793120010170
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Polylactide-low density polyethylene binary blends were obtained in various ratios. The phase transition temperatures in the starting mixtures and after UV irradiation were determined by differential scanning calorimetry. After UV irradiation for 50 h, the melting point of polylactide decreased from 165 to 153 degrees C, while the thermophysical characteristics of polyethylene changed insignificantly. The structure was monitored by IR spectroscopy during photodegradation. The most probable mechanism for the decomposition of polylactide with C=C bond formation corresponding to the 1654 cm(-1) peak in the IR spectrum was proposed.
引用
收藏
页码：167 / 175
页数：9
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