辐射法制备环氧功能化聚乙烯-辛烯及在尼龙6增韧改性中的应用  

Epoxy-functionalized polyethylene-octene prepared byγ-ray radiation and its application in polyamide 6 toughening modification

作　　者：梁青如 季珎琰 董春雷 张帆 邢哲[2] 安雅睿 吴国忠[2,3] LIANG Qingru;JI Zhenyan;DONG Chunlei;ZHANG Fan;XING Zhe;AN Yarui;WU Guozhong(University of Shanghai Science and Technology,Shanghai 200093,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Tech University,Shanghai 200031,China)

机构地区：[1]上海理工大学,上海200093 [2]中国科学院上海应用物理研究所,上海201800 [3]上海科技大学,上海200031

出　　处：《辐射研究与辐射工艺学报》2023年第1期24-32,共9页Journal of Radiation Research and Radiation Processing

基　　金：中国科学院上海应用物理研究所重大科技项目(E215101031)资助。

摘　　要：利用60Coγ射线辐射接枝法制备环氧功能化的乙烯-辛烯共聚物(POE-g-PGMA),并且采用双螺杆熔融挤出法制备添加POE-g-PGMA的尼龙6/聚乙烯-辛烯(PA6/POE)合金。研究了添加POE-g-PGMA对PA6/POE合金力学性能、热性能、表面形貌、界面相容性和吸水特性的影响。结果表明:γ射线引发了GMA在POE上的接枝聚合反应,PA6/POE合金断面的SEM照片显示添加POE-g-PGMA后POE分散相粒径显著减小,表明POE-gPGMA起到增容剂的作用;Molau试验的结果证实了POE-g-PGMA与PA6之间的增容反应;热分析表明,分散相POE及POE-g-PGMA的加入对PA6的熔融行为影响不大,但在降温结晶过程中结晶温度提前约18°C,结晶度提升约为4.5%。此外,与未增容PA6/POE合金相比,增容PA6/POE合金的缺口冲击强度显著提高,在本实验条件下,POE-g-PGMA添加量为3%时缺口冲击强度最高值为纯PA6的2.75倍。Epoxy-functionalized ethylene-octene copolymer(POE-g-PGMA)was prepared by 60Coγ-ray radiation,and polyamide 6/polyethylene-octene blend(PA6/POE)containing POE-g-PGMA was prepared by twinscrew melt extrusion.In this study,the mechanical properties,thermal properties,surface morphology,interfacial compatibility,and water absorption properties of PA6/POE blends with added POE-g-PGMA were investigated.The results showed that GMA was successfully grafted on POE byγ-ray radiation.The morphological analysis showed that the addition of POE-g-PGMA enhanced the dispersion of POE particles in the PA6 matrix.In particular,it demonstrated that with the addition of POE-g-PGMA,pure PA6 has good interfacial compatibility with POE.The results of the Molau test confirmed the compatibilization reactions between POE-g-PGMA and PA6.The thermal analysis showed that the addition of POE and POE-g-PGMA in the dispersed phase had negligible effect on the melting behavior of PA6;however,the crystallization temperature of PA6 improved by approximately 18°C during the cooling crystallization process,and the crystallinity increased by approximately 4.5%.Furthermore,the impact strength of the compatibilized PA6/POE blend was significantly higher than that of the PA6/POE blend,with the highest value of impact strength obtained at a POE-g-PGMA content of 3%being approximately 2.75 times greater than that of pure PA6 under the experimental conditions.

关 键 词：辐射接枝 环氧功能化 尼龙6 界面相容性 缺口冲击强度 

分 类 号：TQ323[化学工程—合成树脂塑料工业] TL13[核科学技术—核能科学]