相容剂对HDPE／PA6共混体系性能的影响  

Effect of Compatibilizer on Properties of HDPE/PA6 Blends

作　　者：戴佳桐 高长青 丁雪佳[1] DAI Jiatong;GAO Changqing;DING Xuejia(The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China;Henan Academy of Arts and Crafts, Zhengzhou, Henan 450000,China)

机构地区：[1]北京化工大学,北京市新型高分子材料制备与加工重点实验室,北京100029 [2]河南工艺美术学校,河南郑州450000

出　　处：《塑料》2017年第6期13-16,共4页Plastics

基　　金：国家自然科学基金(81271184)

摘　　要：采用双螺杆挤出机,制备了乙烯-辛烯共聚物接枝马来酸酐(POE-g-MAH)以及高密度聚乙烯接枝马来酸酐(HDPE-g-MAH)2种增容剂改性的高密度聚乙烯(HDPE)/尼龙(PA6)共混物,研究了不同增容剂对共混物力学性能、耐温性能的影响。采用扫描电镜对共混物的冲击断面进行观察分析。结果表明:相容剂POE-g-MAH的增容效果优于HDPE-g-MAH。PA6添加量为15%时,相容剂HDPE-g-MAH的耐热改性效果优于POE-g-MAH,比纯HDPE的维卡软化点提高了5.8℃,共混物的断裂伸长率为35.0%,降低了1%,拉伸强度为22 MPa,提高了1 MPa,冲击强度为70.6 k J/m2;相容剂为POE-g-MAH时,共混物的断裂伸长率为60.2%,降低了8.4%,共混物的拉伸强度为18.9 MPa,提高了0.4 Mpa,冲击强度为86.7 k J/m2。Two kinds of compatibilizer, POE-g-MAH and HDPE-g-MAH, were selected to compatibilize HDPE /PA6 blends and the effects of compatibilizer on mechanical properties and temperature resistance were also studied. Then the fracture surface of the blends was observed through scanning electron microscope （ SEM）. It was showed that POE-g-HDPE was superior to HDPE-g-MAH in compatibilizing. However, with 15% content of the PA6,the HDPE-g-MAH led to better heat resistance than POE-g-HDPE. Specifically, after the addition of HDPE-g-MAH, the vicat softening point （VST） was increased by 5.8℃ , the elongation at break （35.0%）was reduced by 1% , the tensile strength （22 MPa） was improved by 1 MPa compared with neat HDPE, while the impact strength was 70. 6 kJ/m^2. For POE-g-MAH added blends, the elongation at break （60. 2% ） was reduced by 11.9% , the tensile strength （18.9 MPa） was improved by 0.4 MPa compared with neat HDPE, while the impact strength was 86. 7 kJ/m^2.

关 键 词：高密度聚乙烯 尼龙 相容剂 力学性能 耐热性 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]