Effect of Melt Blending Preparation of PLA-g-MAH/EP on the Properties of PLA/PBAT Composites

被引：0
|
作者：
Xie L. [1 ,2 ]
Huang H. [1 ,2 ]
Yang L. [1 ,2 ]
Zhang F. [1 ,2 ]
Luo Z. [1 ,2 ]
机构：
[1] College of Materials and Metallurgy, Guizhou University, Guiyang
[2] National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2019年 / 35卷 / 07期
关键词：
Grafting; Interface compatibility; Polyadipic acid-butylene terephthalate; Polylactic acid;
D O I：
10.16865/j.cnki.1000-7555.2019.0175
中图分类号：
学科分类号：
摘要：
Polylactic acid (PLA) grafted with maleic anhydride/ epoxy resin (PLA-g-MAH/ EP), as compatibilizer for PLA/ polyadipic acid-butylene terephthalate (PBAT) composites, was prepared by the melt reactive method in a torque rheometer using dicumyl peroxide (DCP) as initiator, and maleic anhydride (MAH) as well as epoxy resin (EP) as co-graft monomer. The PLA/ PBAT composites were prepared by a twin screw extruder. The results show that the grafting rate of PLA-g-MAH is 0.48% when the content of MAH is 2%. The addition of EP greatly promotes the grafting rate of PLA-g-MAH and the grafting rate of PLA-g-MAH (2%)-EP is 1.81% after addition of 3% EP. DSC results show that the double melting peaks of composites disappeare after adding PLA-g-MAH/ EP as compatibilizer. After characterizing the mechanical properties for composites, PLA-g-MAH/EP is found as efficient compatibilizer for PLA/ PBAT composites to highly improve its tensile strength and notch impact strength. At the same time, SEM images show that when PLA-g-MAH/EP is applied, PBAT is effectively dispersed in the PLA matrix phase, which improves the compatibility between PLA and PBAT. © 2019, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：74 / 80
页数：6
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