摘要
研究了室温下γ-射线辐照对超高分子量聚乙烯(UHM WPE)纤维结构和力学性能的影响。电子顺磁共振(ESR)测试表明UHM WPE纤维经γ-射线照射后产生的自由基的半衰期大约是高密度聚乙烯的100倍。傅立叶红外光谱(FT-IR)、差示扫描量热(DSC)、凝胶含量、扫描电镜(SEM)分析表明,UHM WPE纤维在空气中经γ-射线辐照后在纤维表面上引入微量羰基;真空低剂辐照引发纤维表面无定型区分子链上产生交联。力学性能测试表明,在真空下γ-射线照射一定剂量后UHM WPE纤维断裂伸长率增加,拉伸强度没有明显变化。
Ultra-high molecular weight polyethylene （UHMWPE） fiber was irradiated in vacuum and air respectively by γ-rays at room temperature. The effects of γ-ray irradiation on the structure and mechanical properties of UHMWPE fiber were studied. Electron spin resonance （ESR） spectra shows half-life of radicals is about 100 times as long as that of HDPE after irradiation. It is indicated that a small quantity of oxygen-containing groups is introduced in the amorphous region of fiber surface when irradiated in air,by Fourier transform infrared spectroscopy （FT-IR）,differential scanning calorimetry （DSC）,gel content and scanning electron microscopy （SEM）. Irradiated at certain a dose scope in vacuum,crosslinking happens on the molecular chain in the amorphous region of the fiber. Mechanical property tests show that,irradiated at certain a dose scope,elongation at break of the UHMWPE fibers increases,and tensile strength is almost unchanged.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第10期32-35,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(10905088)
关键词
超高分子量聚乙烯纤维
辐照
自由基
力学性能
ultra-high molecular weight polyethylene fiber
irradiation
radical
mechanical property
作者简介
通讯联系人：赵艳凝，主要从事无机化学材料研究，E-mail：spzhaosi@126．com
