Nanophase Structures and Properties of Macromolecular Materials

本研究旨在研究分子聚集的最小水平，即纳米相（一个或多个维度为10-9米的数量级，即原子直径的10-100倍）。在纳米聚合物中，单个大分子参与许多相，从而产生独特的性质，最终导致新材料和应用。结合多种技术，研究了控制结晶-熔化、玻璃化-反玻璃化、有序-无序、退火和变形的分子机制。通过x射线衍射、中子散射、电子和原子力显微镜以及固体核磁共振来研究结构和动力学的细节，如单位胞、微相和纳米相尺寸、取向、应变、缺陷和弛豫现象。在相同的样品上，用新开发的温度调制量热法（TMC）和其他热分析来检查整体性能。这项工作的意义在于聚合物分子的巨大多样性，可用于生产新材料。通过澄清结构、性能和加工之间的联系，期望现代聚合物的发展取得进展。＊＊＊

9703692 Wunderlich The present research is designed to investigate the smallest level of molecular aggregation, that of the nanophase (one or more dimensions is the order of magnitude of 10-9 meter, i.e., 10-100 times the atomic diameter). In nanophase polymers a single macromolecule participates in many phases, resulting in unique properties which ultimately lead to new materials and applications. The molecular mechanisms governing crystallization-melting, vitrification devitrification, ordering-disordering, annealing and deformation are to be studied with a combination of techniques. The details of structure and dynamics, as expressed by the unit cell, micro and nanophase sizes, orientation, strain, defects, and relaxation phenomena are to be studied by X-ray diffraction, neutron scattering, electron and atomic force microscopy, and solid state NMR. On the same samples overall properties are to be checked with the newly developed temperature-modulated calorimetry (TMC) and other thermal analyses. %%% The significance of the work lies in the enormous multiplicity of the polymer molecules which are available for the production of new materials. By clarifying the connection between structure properties, and processing, advances in the development of modern polymers are expected. ***