复合增塑剂改性PLA共混物的结构与性能  

Structure and Properties of PLA/Plasticizer Blends

作　　者：徐蒙蒙[1] 尹朝辉 阳范文[1] 陈美曦 李健婷 欧阳效州 冼彩虹 任学聪[1] 邓健能 李道斌 王晗[4] 陈新度[4] Xu Mengmeng;Yin Zhaohui;Yang Fanwen;Chen Meixi;Li Jianting;Ouyang Xiaozhou;Xian Caihong;Ren Xuecong;Deng Jianneng;Li Daobin;Wang Han;Chen Xindu(Biomedical Engineering Department, Guangzhou Medical University, Guangzhou 511436, China;Jiangxi Zhonghui New Material Co. Ltd.,Xinyu 338019, China;Guangzhou Haierma Vegetable Oil Co. Ltd., Guangzhou 510430, China;Mechanical and Electrical College of Guangdong University of Technology, Guangzhou 510006, China)

机构地区：[1]广州医科大学生物医学工程系,广州511436 [2]江西中辉新材料有限公司,江西新余338019 [3]广州市海珥玛植物油脂有限公司,广州510430 [4]广东工业大学机电学院,广州510006

出　　处：《工程塑料应用》2017年第8期106-111,共6页Engineering Plastics Application

基　　金：2016年度广东省攀登计划;2016年度广州市教育局创新强校工程;2016年度广医-海珥玛联合研究项目;2017年度广医-中辉新材联合研究项目

摘　　要：采用HM–128,HM–529两种增塑剂复配对聚乳酸(PLA)进行熔融共混改性,研究增塑剂用量对共混物的流变性能、拉伸性能和微观形态结构的影响,筛选增塑剂复配最佳配比和用量。结果表明,确定HM–128与HM–529质量比为1∶1保持不变,随着增塑剂用量增加,共混物的平衡转矩和拉伸强度降低、断裂伸长率增加、撕裂强度呈先增加后减小的趋势,淬冷断面由平整变为粗糙;在复合增塑剂总质量分数16%不变的情况下,随着复配增塑剂中HM–529含量的增加,共混物的平衡转矩增大、断裂伸长率提高,当HM–128/HM–529质量比=1/1时,共混物的拉伸强度、断裂伸长率和撕裂强度分别为35.6 MPa,209.2%和30.6 N/cm,淬冷断面非常粗糙,获得了良好的增韧效果,共混物的综合性能最理想。The polylactic acid(PLA)were modified by the mixture of HM-128and HM-529.The optimum dosage and proportion of mixed plasticizer were studied by investigating the influences of them on rheological properties,tensile properties and microstructure of blends.The results show that when the mass ratio between HM-128and HM-529is1/1the tensile strength and the balance torque of blends decrease,the elongation at break increases,the tear strength increases first and then decreases with the increase of plasticizer dosage.Meanwhile the brittle cold section becomes rough from smooth.Based on the16%of composite plasticizer dosage,the balance torque and the elongation at break all increase with the increase of the content of HM-529in the composite plasticizer.When the ratio of HM-128/HM-529is1/1,the blends is characterized with tensile strength of35.6MPa,tear strength of30.6N/cm and the elongation at break of209.2%,brittle cold section is very rough.The toughening effect of the blends is good and the comprehensive properties are optimal.

关 键 词：聚乳酸 增塑 微观结构 流变性能 力学性能 

分 类 号：TB322[一般工业技术—材料科学与工程]