摘要
通过转矩流变分析、差示扫描量热(DSC)和核磁共振氢谱(1H-NM R)等手段研究了不同聚碳酸酯(PC)/乙烯-醋酸乙烯酯共聚物(EVA)共混体系在加工过程中的大分子反应,考察了有机金属催化剂(氧化二丁基锡DBTO)含量和反应时间对共混体系的影响。结果表明,PC和EVA可以在熔融共混过程中发生大分子反应,在界面原位形成接枝或交联的PC-EVA共聚物,催化剂用量增大、反应时间延长易生成共交联的PC-EVA共聚物,但混合时间过长,体系的断链加剧,所生成产物不稳定。
This paper deals with the transesterification occur in PC/EVA melting blend system in the presence of organometallic catalyst. The characteristics of the blend were evaluated by Haake Torque Rheometer, Differential Scanning Calorimetry （DSC） and Nuclear Magnetic Resonance （NMR） analyses. The results show that the reaction does take place in PC/EVA blend system, and increaseing the mixing time and the content of the catalyst, the more grafted or cocrosslinked copolymers PC-EVA are generated, but the structure and stability of reaction have a optimal processing time.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第6期201-204,208,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金重大项目资助(10590352)
