Effect of Poly(D-lactide)-r-Poly(ε-caprolactone) Random Copolymer on Structure Regulation and Properties of Poly(L-lactide)/ Poly(ε-caprolactone) Blends

被引：0
作者：
Yang B. [1 ]
Li Q. [1 ]
Li X. [1 ]
Qi Y. [1 ]
Dong Z. [1 ]
Wang R. [1 ]
Zhang X. [1 ]
机构：
[1] School of Materials Science and Engineering, Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, Beijing
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2019年 / 35卷 / 04期
关键词：
Crystal; Mechanical propertie; Poly(D-lactide)-r-poly(ε-caprolactone) random copolymer; Poly(L-lactide); Poly(ε-caprolactone);
D O I：
10.16865/j.cnki.1000-7555.2019.0106
中图分类号：
学科分类号：
摘要：
Poly(D-lactide)-r-poly(ε-caprolactone) (PDLA-r-PCL) was used as compatibilizer for preparing poly(L-lactide) blends with poly(ε-caprolactone) (PLLA/PC L) by melt blending. The effects of PDLA-r-PCL on the structure and properties of PLLA/PCL blends were studied by differential scanning calorimetry (DSC), sca nning electron microscopy (SEM) and X-ray diffraction and tensile testing (XRD). With the increase of PDLA-r-PCL content, the content of stereocomplex crystal (SC) in the blends gradually increases. And the crystallization temperature of α crystal increases from 93 ℃ to 108 ℃, which indicates that the existence o f SC could improve the nucleation of α crystal. With the addition of PDLA-r-P CL, the compatibility of PLLA and PCL is significantly improved. With the increa sing of PDLA-r-PCL content, the phase size of PCL decreases and the interface becomes blurred. The elongation at break of PLLA/PCL/PDLA-r-PCL after quenchin g and annealing is higher than that of PLLA/PCL. Meanwhile, the strength of PLLA /PCL/PDLA-r-PCL is slightly increased. The introduction of PDLA-r-PCL could effectively enhance the impact strength of PLLA/PCL annealed samples. © 2019, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：79 / 86
页数：7
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