摘要
使用扫描电子显微镜、偏光显微镜和Ｘ－ｒａｙ衍射分析仪，研究了淀粉、淀粉丙烯腈接枝共聚物（ＳＰＡＮ）及其经碱皂化后的产物ＨＳＰＡＮ的颗粒形貌结构和晶体特性。结果表明：ＳＰＡＮ仍具有类似于淀粉颗粒形貌的颗粒结构；同时，低接枝百分率的ＳＰＡＮ接枝反应主要发生在淀粉颗粒的非结晶区，但随着接枝百分率的提高，接枝共聚反应逐渐向淀粉颗粒内部结晶区渗透，淀粉颗粒的结晶区逐渐被破坏，当接枝百分率高于５４．８９％时，原淀粉颗粒的半结晶性基本上被完全破坏；而ＨＳＰＡＮ为非晶体结构。
Studies on the surface structure and the crystal character of the granules of the graft copolymer of starch and acrylonitrile(SPAN) and its saponified product(HSPAN),by means of SEM,polarizing microscope and X ray diffraction were carried out and the results showed that:SPAN was granular structure which was similar to starch granule. Graft copolymerization mainly occurred in its amorphous regions in the SPAN of low grafted percent ratio,but infiltrated into and destroyed its crystal regions with the increasing of grafted percent ratio.The semi crystal structure of starch granule was completely destroyed when the grafted percent ratio was higher than 54.89%. In addition,HSPAN was not crystal structure.
