Effects of topological constraints in polymer melts on crystallization and structure formation (A01)

聚合物熔体拓扑约束对结晶和结构形成的影响 (A01)

• 批准号: 203141301
• 金额: --
• 依托单位: Fachgruppe Experimentelle Polymerphysik
• 依托单位国家: 德国
• 项目类别: CRC/Transregios
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/203141301?language=en
• 关键词: Effects; topological; constraints; polymer; melts

We study the effect of the constraints exerted by the topological structure and the dynamics of the entangled polymer melt, and of the presence or absence of chain dynamics within the crystallites, on the crystallization and on the semicrystalline morphology of polymers. Extending the number of model materials beyond the so far studied cases of poly(ε-caprolactone) and poly(ethylene oxide), including now in particular copolymers, we investigate the structure formation and the resulting morphology in a systematic way by combining small angle x-ray scattering, optical microscopy, DSC, rheology and solid-state NMR. Special emphasis is given to investigating the properties of the amorphous fraction of the semi-crystalline materials, in which the density of entanglements plays a decisive role.

我们研究的拓扑结构和纠缠的聚合物熔体的动态施加的约束，和存在或不存在的微晶内的链动力学的影响，上的结晶和聚合物的半结晶形态。扩展的模型材料的数量超出了迄今为止研究的情况下的聚（ε-己内酯）和聚（环氧乙烷），包括现在特别是共聚物，我们调查的结构形成和由此产生的形态系统的方式相结合的小角X射线散射，光学显微镜，DSC，流变学和固态NMR。特别强调的是调查的半结晶材料的非晶部分的性质，在其中的纠缠密度起着决定性的作用。