Polymer Miscibility Due to Specific Interaction

本研究的目的是研究聚合物共混物中链段混合的均匀性，其中少量的相互作用基团负责可混性。虽然特定的相互作用已被证明是非常有效的，在促进相容性，仍然有未解决的问题的分子图像的状态下的链段混合。基于初步的结果，扩散探针，以研究在这些共混物中的段的流动性将被使用，因为在聚合物中的小分子的扩散涉及的合作运动的只有一小部分，并提供信息的混合程度上的规模小于与玻璃化转变现象。CP/MAS碳-13 NMR研究将与扩散实验平行进行。该方法提供的优点在于能够独立地确定共混物中每种组分的弛豫响应，并且应该提供对通过少量相互作用基团聚集在一起的否则不混溶的聚合物的链段的布置的答案。

The objective of this research is to study the homogeneity of segmental mixing in polymer blends in which a small number of interacting groups are responsible for miscibility. Although specific interaction has proven to be very effective in promoting miscibility, there are still unresolved questions about the molecular picture of the state of segmental intermixing. Based on preliminary results, diffusional probes to study segment mobility in these blends will be used because the diffusion of a small molecule in polymers involves the cooperative motion of only a small number of segments and provides information about the degree of mixing on a scale smaller than that associated with the glass-transition phenomenon. CP/MAS carbon-13 NMR studies will be carried out in parallel with diffusion experiments. This method offers the advantage in being able to determine the relaxation responses of each component in the blend independently and should provide answers to the disposition of segments of otherwise immiscible polymers brought together by a small number of interacting groups.