Effect of Substrate Surface on Polymer Crystallization

由本课题组主办的“高分子结晶”国际研讨会于2002年6月9日至12日在三岛召开。我们的研究小组在研讨会上作了2次口头报告和4次海报报告。此外，在2002年7月2日至6日在中国金岛举行的高分子物理国际研讨会上作了海报介绍。此外，在国内有关高分子物理的会议和专题讨论会上作了9次海报介绍。在上述会议上进行和介绍了各种类型的高分子结晶研究，其中一些研究仍在继续。本年度的主要研究结果如下：1）发现聚环氧乙烷在碱金属卤化物上结晶时，形成了扩散限制聚集体（DIA）。这是第一例在聚合物结晶中发现的DLA。扩散是聚合物结晶的一个非常重要的因素， ...更多信息 本项目的主要目标之一是明确扩散对聚合物结晶的作用。2）无定形聚1-丙交酯退火结晶时，低温退火形成β晶型，高温退火形成α晶型。此外，β型晶体在略低于熔点的温度下转变为α型。这两种晶型之间的关系迄今为止是模糊的，这是明确的，在本工作中。3）结构的形成在高速纺丝是一个重要的主题，从工业的角度来看。有关纤维结构的发展及其形成机理的研究，是纤维科学中一个相对落后的领域。在与其他小组的成员合作，我们负责电子显微镜和原子力显微镜的聚（对苯二甲酸萘酯）纤维在高速纺。高速纺制的纤维具有与低速纺制的纤维不同的织构。但其结构和结构发展方式为何依赖于纺丝速度，还有待进一步研究。少

The International Symposium on "Polymer Crystallization", which was sponsored by the Present Project, was held from June 9-June 12, 2002, in Mishima. Our research group gave 2 oral and 4 poster presentations at the Symposium. Further, a poster presentation was given at the International Symposium on Polymer Physics, which was held from July 2-6, 2002, in Quindao, China. In addition, 9 poster presentations were given in domestic meetings and symposiums concerning with polymer physics.Various types of studies on polymer crystallization have been carried and presented at the above meeting, and some of them are continued still. The outstanding and important results in this year are summarized as follows.1)It was found that when poly(ethylene oxide) was crystallized on alkali halides, the diffusion-limited aggregates (DIA) were formed. It is the first case of DLA, which was identified in polymer crystallization. Diffusion is a very important factor of polymer crystallization, and then it is … More one of main targets on the present project to make clear the role of diffusion on polymer crystallization. The typical diffusion phenomenon, DLA, was realized in this way and proves the diffusion is an important factor on crystallization of polymers.2)When amorphous poly-1-lactide was crystallized by annealing, the crystals of the βform was formed by annealing at low temperature and ones of the a form at high temperatures. Further, the βform of crystals were transformed into the α form at a temperature just below the melting point. The relationship between the two crystalline forms was ambiguous so far, and it was made clear in the present work.3)Structural formation in high speed spinning is an important theme from the industrial point of view. The study concerning with the structural development and its formation mechanism is in the undeveloped field of fiber science. In cooperation with members of other groups, we were responsibility for electron microscopy and atomic force microscopy of the poly(naphthalene terephthalate) fiber spun at high speed. The high-speed-spun fiber exhibited the different texture from the fiber obtained at low spinning speed. However, it is room for further studies why the structure and the manner of structural development depend on the spinning speed. Less