foldできない高分子鎖の結晶化・結晶欠陥

通过本课题的研究，取得了以下成果：(1)在凝胶渗透色谱(GPC)的基础上发展了刚性聚合物的裂解方法，例如对PBZT和PBZO(分子长度为40 nm)进行了分离。(2)分子量分布对晶体形态的影响。反之，未分馏样品的相对分子质量分布较广，纤毛从母晶中伸出较长，促进了Dauther晶体的生长，得到了多层片状晶体或棒状聚集体。(3)刚性聚合物晶体的表面形态用原子力显微镜观察了晶体表面。位于菱形板中心的初级核由最长的分子链组成。(4)异构化对结晶和晶格缺陷的影响合成了新型聚合物顺式PBZT。并与反式PBZT的形貌和晶体结构进行了比较，讨论了异构化对其性能的影响。(5)化学结构对结晶和晶体缺陷的影响以PBZT为原料，合成了杂环元素不同的顺式PBZO，并进行了晶化。讨论了化学结构对刚性聚合物结晶和结晶缺陷的影响。

Following results were obtained through this research project.(1) Factionation of rigid polymerFractionation method for rigid polymer was developed basing on GPC,e.g., PBZT and PBZO (molecular length < 40nm) was fractionated.(2) Effect of the molecular weight distribution on crystal morphologyWith fractionated sample, plate like crystals were obtained because of short cilia on both sides of the plate. On the contrary, there is wide distribution of molecular weight in unfractionated sample, many longer cilia stuck out from mother crystal which promoted growing of dauther crystal, hence multi layr plate-like crystals or raft-like aggregates of rod-like crystals were obtained.(3) Surface morphology of rigid polymer crystalsThe crystal surface was examined by an atomic force microscopy. Primary nucleus at the center of the lozenge plate was composed of the longest molecular chains. Along the diagonal, there was a striation.(4) Effects of isomerism on crystallization and crystal defectsNovel polymer cis-PBZT was synthesized. Its morphology and crystal structure were compared with those of trans-PBZT and the effects of the isomerism were discussed. In the case of cis- PBZT,packing disorder along the chain axis (axial shift) was diminished.(5) Effects of chemical structure on crystallization and crystal defectsCis-PBZO which has different element in hetero rings from PBZT was synthesized and crystallized. The effects of chemical structure on the crystallization and crystal defects of rigid polymers were discussed.