Structural Control of Poly (L-lactide)-r-Poly (ε-caprolactone) Random Copolymer and Its Thermal, Mechanical and Gas Barrier Properties

被引：0
|
作者：
Hu J. [1 ]
Lu H. [1 ]
Zhang J. [1 ]
Bu H. [1 ]
Yun X. [1 ]
Dong T. [1 ]
机构：
[1] College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2019年 / 35卷 / 11期
关键词：
Crystallinity; Gas bar-rier property; Gas permselectivity; Poly (L-lactide); Poly (ε-caprolactone); Random copolymer;
D O I：
10.16865/j.cnki.1000-7555.2019.0295
中图分类号：
学科分类号：
摘要：
Poly(L-lactide)-r-poly (ε-caprolactone)(PLLA-r-PCL) random copolymer films with different composition ratios were prepared. The thermal property, mechanical property and gas barrier property were studied, meanwhile the relationship between gas barrier property and copolymer structure was discussed. The crystallization property of the materials was analyzed by ATR-FT-IR and differential scanning calorimeter(DSC). Studies show that the crystallinity of the material decreases with increasing of the PCL content which resulted in the films being almost completely amorphous. Compared to PLLA, the elongation at break of PLLA-r-PCL30 measured by tensile tester is 611%, which is 70 times of that of PLLA. Meanwhile, the gas permeability of the films were comprehensively analyzed by manometric gas permeability tester. Compared to PLLA, the CO2 permeability(CDP, 40℃) and O2 permeability (OP, 40℃) of PLLA-r-PCL30 are increased by 801% and 523% respectively, the α(CO2/O2, 5℃) of PLLA-r-PCL30 is 7.0 which is increased by 115% and the water vapor transmission rate(WVTR, 20℃) of it is increased by 354%. © 2019, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：74 / 81and87
页数：8113
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