LDPE/CA-MMT纳米复合材料结晶动力学研究  

Crystallization Kinetics of LDPE/CA-MMT Nanocomposites

作　　者：宋文枫 魏小芳[1] 许颖[1] 王璐 范坤[2] 白银[2] 田茂章 张帆[1] 张敏[2] 江航[1] 邵光强[2] 黄佳[1] 杨济如 郑苗苗 赵越 章峻[3] Song Wenfeng;Wei Xiaofang;Xu Ying;Wang Lu;Fan Kun;Bai Yin;Tian Maozhang;Zhang Fan;Zhang Min;Jiang Hang;Shao Guangqiang;Huang Jia;Yang Jiru;Zheng Miaomiao;Zhao Yue;Zhang Jun(State Key Laboratory of Enhanced Oil Recovery,Research Institute of Petroleum Exploration and Development,CNPC,Beijing 100083,China;Tarim Oilfield Company,PetroChina,Korla 841000,China;Jiangsu Collaborative Innovation Center of Biomedical Functional Materials,National and Local Joint Engineering Research Center of Biomedical Functional Materials,Jiangsu Engineering Research Center for Biomedical Function Materials,School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]中国石油勘探开发研究院强化采油国家重点实验室,北京100083 [2]中国石油塔里木油田公司,新疆库尔勒841000 [3]江苏省生物医学功能材料协同创新中心,生物医学功能材料国家和地方联合工程研究中心,江苏省生物医学功能材料工程研究中心,南京师范大学化学与材料科学学院,江苏南京210023

出　　处：《南京师大学报（自然科学版）》2021年第3期31-37,共7页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省重点研发项目(BE2019391)。

摘　　要：聚合物/层状硅酸盐纳米复合材料是功能化无机/有机纳米复合材料的典型代表.层状硅酸盐填料的加入会导致聚合物结晶性能的明显变化,进而对聚合物复合材料的使用性能产生显著影响.因此,对聚合物/层状硅酸盐纳米复合材料结晶性能和结晶动力学的研究具有极大的实际应用价值.本文以哈克转矩流变仪制备了具有长效抗菌功能的低密聚乙烯/醋酸洗必泰-蒙脱土(LDPE/CA-MMT)纳米复合材料,通过差示扫描量热计(DSC)研究其结晶性能和结晶动力学,并与纯LDPE,LDPE/MMT,LDPE/CA样品进行比较.结果表明,MMT的加入可诱导LDPE结晶的异相成核,CA的增塑作用则会导致结晶速率常数K值的下降,而MMT对LDPE分子链运动的阻隔作用则会导致LDPE结晶生长速率的降低.Polymer/layered silicate(PLS)nanocomposites are a class of typical functionalized inorganic/organic nanocomposites.The properties of PLS nanocomposites can be influenced by the intercalation of layered silicate fillers,since the intercalation can cause changes in the crystallization properties of the polymer.Therefore,it is important to investigate the crystallization propertiesand kineticsof PLS nanocomposites.In this work,a series of PLS nanocomposites were prepared by melt blending low density polyethylene(LDPE)with montmorillonite(MMT),chlorhexidine acetate(CA)and CA-MMT on a Hark torque rheometer.The crystallization properties of these PLS nanocomposites and kinetics were investigated with differential scanning calorimetry(DSC).The addition of MMT led to the heterogeneous nucleation of LDPEcrystallization.In addition,the plasticization of CA reduced the crystallization rate constant K.The hindering effect of MMT on the movement of LDPE chains reduced the crystallization rate of LDPE.

关 键 词：低密聚乙烯 醋酸洗必泰 蒙脱土 结晶动力学 

分 类 号：O631.13[理学—高分子化学]