纳米有机蒙脱土对尼龙6/N-苯基马来酰亚胺-马来酸酐的结构及耐热性能影响  

Effect of Nano Organic Montmorillonite on Structure and Heat Resistance of PA6/NMA

作　　者：何敏[1,2] 龚吉勇 李莉萍[1,2] 赵婉 张道海[1,2] 于杰[2] 张景中[2] Min He1,2, Jiyong Gong1,2, Liping Li1,2, Wan Zhao1,2, Daohai Zhang1,2, Jie Yu2, Jingzhong Zhang2(1. College of Materials Science and Metallugry Engineering, Guizhou University, Guiyang 550025, China ; 2. National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, Chin)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《高分子材料科学与工程》2018年第3期30-35,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51663006);贵州省科技计划项目(黔科合重大专项字(2015)6005号);黔科合KY字[2015]359;黔科合人才[2016]4039号;白科合同[2015]18号;贵州省科技厅科技联合基金项目(黔科合LH字[2015]7708);贵州大学研究生创新基金(研理工2016021)

摘　　要：采用自制新型耐热改性剂N-苯基马来酰亚胺-马来酸酐二元共聚物(NMA)与纳米有机蒙脱土(OMMT)对尼龙6(PA6)进行熔融共混制备了PA6/NMA/OMMT纳米复合材料,并通过透射电镜、X射线衍射、差示扫描量热、旋转流变仪、热变形及力学性能测试等分析研究了纳米OMMT用量对PA6/NMA/OMMT纳米复合材料的结构及耐热性能的影响。结果表明:纳米OMMT剥离分散在PA6基体中,诱导了PA6由α晶型向γ晶型转变;且OMMT对PA6/NMA/OMMT纳米复合材料的异相成核作用提高了体系结晶度。此外,对比于PA6/NMA复合材料,PA6/NMA/OMMT纳米复合材料的动态复合黏度、储存模量、损耗模量均增大;且PA6/NMA/OMMT纳米复合材料热变形温度及力学性能随着OMMT添加量的增加呈增大趋势。Nylon 6/N-phenyl maleimide-maleic anhydride binary copolymer/organic montmorillonite （PA6/NMA/OMMT） nanocomposite were prepared by melting extrusion. NMA, as a new type heat resistant modifier for PA6, was synthetized via the method of copolymerization. To investigate the influence of OMMT on PA6/NMA/OMMT nanocomposite, the morphologies, rheological properties and thermal behaviors of PA6/NMA/OMMT nanocomposite were discussed via the analysis of transmission electron microscope （TEM）, X-ray diffraction （XRD）, differential scanning calorimetry （DSC）, rotational rheometer as well as heat distortion temperature and mechanical properties. Results show that the well dispersion and distribution of OMMT in exfoliation structure in PA6 have great influence on properties of PA6/NMA/OMMT nanocomposite. In addition, the α crystalline form of PA6 could be induced to shift to γ form with addition of OMMT. Due to the heterogeneous nucleation of the exfoliated OMMT, the crystallinity of PA6/NMA/OMMT nanocomposite is slightly improved, compared with PA6/NMA composite. Similarly, a rise in complex viscosity, storage modulus, and loss modulus as well as heat distortion temperature of PA6/NMA/OMMT nanocomposite occur. In addition, the heat distortion temperature and mechanical properties of PA6/NMA/OMMT nanocomposites reach the maximum with addition of 4 phr OMMT.

关 键 词：流变性能 耐热性能 热变形温度 纳米复合材料 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]