摘要
采用悬浮聚合法制备了丙烯腈-丙烯酸胺共聚物(co-PAN),静电纺丝制得co-PAN纳米纤维,在不同温度下对co-PAN纳米纤维进行热处理;借助红外吸收光谱、热重分析、X射线衍射对co-PAN的结构性能进行表征;通过扫描电镜观察了co-PAN纳米纤维的形貌。结果表明:红外吸收光谱证明了co-PAN为丙烯腈与丙烯酰胺的共聚产物;丙烯酰胺的引入破坏了PAN原有的晶格结构,其环化温度降低,co-PAN热失重后的最终残留率约45%;随着co-PAN的浓度增大,co-PAN纳米纤维的平均直径是先增大后减小,210℃热处理时,co-PAN纳米纤维出现明显的交联;加入丙烯酰胺,改变了co-PAN预氧化的环化机理,在较低的温度下可实现环化。
Acrylonitrile-acrylamide copolymer （co-PAN） was prepared by suspension polymerization process and was spun into co, PAN nanofiber which was exposed to heat treatment at different temperatures by electrospinning process. The structure and properties of co-PAN were characterized by infrared absorption spectroscopy, thermogravimetric analysis and X-ray diffraction analysis. The morphology of co-PAN nanofibor was observed by scanning electron microscopy. The infrared absorption spectra showed that co-PAN was the copolymer product of acrylonitrile and acrylamide, The introduction of acrylamide damaged the original lattice structure of PAN. The cyclization temperature of PAN was decreased. The final residual rate of co-PAN was about 45% after thermal weight loss. The average diameter of co-PAN nanofiber was increased and then decreased with the increase of co-PAN concentration. Obvious crosslinking occured while the co-PAN nanofiber was heated up to 210%;. The introduction of acrylamide changed the cyclization mechanism of preoxidation process and helped to accomplish the cyclization at lower temperatures.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2010年第5期34-37,共4页
China Synthetic Fiber Industry
关键词
聚丙烯腈纤维
丙烯腈
丙烯酰胺
共聚
静电纺丝
热处理
polyacrylonitrile fiber
acrylonitrile
acrylamide
copolymerization
electrospinning
heat treatment
