光引发交联改性对尼龙6性能的影响  

The Effects of Photocrosslinking on the Properties of PA6

作　　者：华林林[1] 吕建平[1] 谢飞[1] 叶磊[2] 吴强华[2] 瞿保钧[2] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]中国科学技术大学高分子科学与工程系,安徽合肥230026

出　　处：《高分子材料科学与工程》2013年第3期35-38,共4页Polymer Materials Science & Engineering

基　　金：国家科技支撑计划项目(2007BAE27B01)

摘　　要：在光交联剂的存在下,研究紫外光辐照交联改性尼龙6。通过凝胶含量测试、衰减全反射红外光谱、热重分析和差示扫描量热法(DSC)考察了紫外光辐照尼龙6的交联特征及相关性能。结果表明,当紫外光辐照5s时,凝胶含量达到99.2%,拉伸强度从60.0MPa增加到73.2MPa。紫外光辐照后,尼龙6的结晶度和熔点下降,热稳定性提高。在光交联同时,尼龙6表面也发生光氧化降解,并随辐照时间的延长而加剧,导致尼龙6的力学性能下降。The photoinitiated crosslinking and properties of photo-crosslinking nylon 6 was studied by the determination of gel content, attenuated total internal reflectance Fourier transform infrared spectroscopy （ATR-FT- IR）, thermogravimetric analysis （TGA）, differential scanning calorimetry （DSC） and mechanical measurements. The results show that the gel contents of nylon 6 reach 99.24 % from original zero and the tensile strength increases from original 60.0MPa to 73.2 MPa after 5 seconds irradiation. Furthermore, both of the crystallinity degree and melting point of nylon 6 decrease steadily, and the thermal stability of nylon 6 increases apparently with the irradiation time increasing. The surface photo-oxidation in the photoinitiated crosslinking of nylon 6 was also observed evidently with the extension of the irradiation time, leading to decrease in the mechanical properties of nylon 6.

关 键 词：尼龙6 紫外光交联 力学性能 结晶度 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]