高分子结晶领域充满了魅力，吸引着众多研究者的兴趣。本申请项目拟通过构建一类在全组成范围内显示单一晶体结构的聚酯类质同晶体系，通过类质同晶体系来明确分子链结构，尤其是高分子构象和相互作用对于高分子结晶性能的影响，考察其过程中的结晶能垒、构象转变等问题。并且将类质同晶作为一种新的制备高效成核剂的方法，评估晶胞匹配程度对其诱导结晶能力的影响，为构建新型高效的高分子成核剂和研究成核机理提供指导。在此基础上，利用高效成核作用，研究基体材料在其熔点附近温度段内的结晶和熔化行为，进一步研究低过冷度下聚合物结晶的机理。

The field of polymer crystallization has attracted many researchers' interest for its charm. In this proposal we intend to construct a new type of polymer isomorphism system, which adopts a single crsytal structure in all compositions. We'll try to clarify what role the chain structure, especially the chain conformation and intermolecular interaction, play in polymer crystallization , and investigate the energy barrier, conformational adjustment and other issues during the crsytallization process.Isomorphism will be used as a new and effective method for developing nucleating agent, and also be used to assess the effect of matching of cell parameters on nucleation efficiency.The mechanism of nucleation via isomorphism will be exploited. Further more, with the polymeric nucleating agents, we can accelerate the crystallization rate of polyesters. On this basis, the polymer crystallization behavior at the temperatures near the melting point, su as the equilibrium melting point, the zero growth temperature, the Hoffmann-Weeks plot, will be studied as well.