Crystallization Regulation and High Performance of Alternating Multilayer Films of L-Poly (lactic acid)/D-Poly (lactic acid)

被引：0
作者：
Gao Y. [1 ]
Li J. [1 ]
Guo S. [1 ]
机构：
[1] State Key Laboratory of Polymer Materials Engineering, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, Polymer Research Institute of Sichuan University, Chengdu
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2020年 / 36卷 / 08期
关键词：
Polylactic acid; Stereocomplex crystallites; Transcrystalline; Two-dimensional continuous;
D O I：
10.16865/j.cnki.1000-7555.2020.0187
中图分类号：
学科分类号：
摘要：
By solution coating method, l-polylactic acid (PLLA) and d-polylactic acid (PDLA) solutions with the concentration of 0.04 g/mL were alternately coated by scraping machine layer by layer and dried to prepare the films, and PDLA/PLLA (1: 1) blend solution and pure PLLA solution were prepared by coating machine at the same way to prepare the films as comparison sample. By differential scanning calorimetry (DSC), two-dimensional WAXD, SEM, universal drawing machine and differential pressure gas permeometer, the effects of PDLA/PLLA alternating multilayer structure on the crystallization behavior, microstructure, mechanical properties and oxygen barrier properties of PLA were studied. The results show that the two-dimensional continuous stereocomplex crystallites (2D-SC) could be formed between PLLA layer and PDLA layer, and the two-dimensional continuous stereocomplex crystallites (2D-SC) could also be used as nucleating agent to induce the generation of continuous ordered PLLA transcrystalline (PLLA-TC) and PDLA transcrystalline (PDLA-TC) on both sides. The presence of 2D-SC, PLLA-TC and PDLA-TC can greatly improve the gas barrier properties of PLA. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：104 / 108
页数：4
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