A NEW METHOD FOR PREPARATION OF NYLON 6 WITH HIGH CRYSTALLINITY AND SPECIAL MORPHOLOGY
We adopt a new facile method to modify the crystalline behavior of nylon 6 to improve the quality of nylon product. The key strategy is to utilize vapor of precipitator (such as THF, H2O) to induce crystallization of nylon from its formic acid solution at room temperature and ambient pressure. The obtained Nylon 6 samples (denoted as vp-nylon 6) exhibit improved crystallinity and perfection. Additionally, unique morphological feature is also observed. For comparison, a nylon 6 sample is prepared by using general thermal treatment processes (denoted as gt-nylon 6). That is, the nylon 6 sample is melted and kept at 280℃ to erase former thermal history, then cooled down slowly to induce the crystallization. The DSC results indicate that vpnylon 6 has not only high degree of crystalline perfection, but also high crystallinity. The DSC curve of the vp-nylon 6 exhibited only a sharp melting peak while the melting peak of the gt-nylon 6 is a wide envelope, which might be attributed to superposition of melting and pre-melting processes.
Hui-Zhen Li Yizhuang Xu Jinguang Wu Cheng-feng Zhang Lei Kong Yanjie Wu Dong-liang Tao Jing Chen Xue-xin Liu Haibin Chu Yan Li
College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
109-110
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）