文献类型：期刊文献

中文题名：挤出循环对玻纤增强PA66复合材料流变性能和力学性能的影响

英文题名：Influence of Extrusion Cycle on the Rheological and Mechanical Properties of Glass Fiber Reinforced PA66 Composites

作者：张来胜[1];王婷兰[1];唐颂超[1];孟庆国[2];张祥福[2]

机构：[1]华东理工大学材料科学与工程学院,上海200237;[2]上海普利特复合材料股份有限公司,上海201707

年份：2017

卷号：43

期号：2

起止页码：178

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

语种：中文

中文关键词：玻纤增强尼龙66;挤出循环次数;流变性能;特性黏度;力学性能

外文关键词：g la ss f ib e r re in fo rc ed PA66 c omp o s i te s; e x t ru s io n c y c le s; rheo log ical p ro p e r t ie s; in tr in s ic viscosi ty; mechanical p ro p e r t ie s

摘要：通过双螺杆挤出机对w=35%玻纤增强尼龙66(PA66/GF35)复合材料进行循环加工,研究了挤出循环次数对PA66/GF35的流变性能、热性能、玻纤长度和力学性能的影响。结果表明:随挤出循环次数的增加,PA66/GF35复合材料的熔体体积流动速率逐渐增加,表观黏度显著下降;多次挤出加工使PA66基体发生热氧降解,特性黏度逐渐减小,熔点、结晶温度、结晶度略有降低;玻纤断裂,玻纤保留长度变短。PA66/GF35复合材料的力学性能随挤出循环次数的增加逐渐下降,经4次挤出循环后其拉伸强度、弯曲模量和冲击强度分别下降了38.41%、21.73%和67.33%。
Glass f ib e r re in fo rc ed PA66 （P A6 6 /GF 3 5 ） comp o s i tes w ere rep ro c e s sed by th e tw in screw ext ruder . The effects of ext rus ion cycles on the rheological propert ies, thermal per formance, glass fiber length and mechanical proper t ies were inves t igated. The resul ts showed that the melt volume flow rate of PA66/GF35 composi tes increased gradual ly and their apparent viscos i ty decreased s ignif icantly upon increas ing the number of reproces s ing cycle. For PA66 mat rix, thermal oxidat ive degradat ion occurred during ext rus ion cycles , which led to the decrease of the int r insic viscosi ty, the melt ing point , crys tall izat ion temperature and the degree of crystal l ini ty,as well as the f ract ion of glass f iber and reduct ion of glass fiber length. Mechanical proper t ies of PA66/GF35 compos i tes were weakened wi th the increase of extrus ion cycle. Af ter four cycles ext rusion, thei r tens i le st rength, f lexural modulus and impact st rength reduced by 38.41%,21. 73% and 67. 33 % , resp ect ive ly .