侧链式含硅氧烷高分子的聚合度对晶体结构的影响  

The Influence of Side-chain Polyhedral Oligomeric Silsesquioxanecontaining Polymer’s Degree of Polymerization on Its Crystal Structure

作　　者：贾富成 尤恒之 洪程阳 刘浩[1] JIA Fu-cheng;YOU Heng-zhi;HONG Cheng-yang;LIU Hao(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Center for Advanced Low-Dimension Materials,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纤维材料改性国家重点实验室,先进低维材料中心,上海201620

出　　处：《高分子通报》2024年第9期1254-1262,共9页Polymer Bulletin

基　　金：国家自然科学基金青年科学基金项目(基金号22003008);上海市科学技术委员会自然科学基金面上项目(基金号20ZR1401000)。

摘　　要：高分子结晶行为与其材料性能密切相关,是高分子物理学一个重要的基础研究领域。含团簇高分子是近年来兴起的一类新型杂化高分子,它结合了纳米团簇类物质丰富的功能性与高分子材料良好的可加工性,为先进杂化材料的开发提供了新的思路。本文以侧链式含多面体倍半硅氧烷(POSS)团簇高分子为研究对象,通过精准化学技术控制其分子参数,合成了一系列具有不同聚合度的精准高分子。通过在溶液中进行单晶生长,并对其形貌、结构与热力学参数进行系统分析,发现本文研究范围内的聚合度并不影响单晶的晶体结构,也与片晶厚度、熔融温度等无明显关联性。从溶液中生长的单晶受到溶剂、温度、浓度扰动等动力学因素的影响较大,并非热力学稳定态晶体。The crystallization behavior of polymers is closely related to their material properties,representing an important fundamental research area in polymer physics.Cluster-containing polymers are a newly emerging class of hybrid polymers that combine the rich functionality of nanoclusters with the excellent processability of polymer materials,providing new avenues for the development of advanced hybrid materials.In this study,polyhedral oligomeric silsesquioxane(POSS)cluster-containing polymers with side chains were investigated.A series of precise polymers with different degrees of polymerization were synthesized through precise chemical techniques to control their molecular parameters.Single crystal growth was conducted in solution,and a systematic analysis of their morphology,structure,and thermodynamic parameters was performed to investigate the influence of polymerization degree on their crystallization behavior.Within the scope of this study,it was found that the degree of polymerization did not affect the crystal structure of single crystals,and there was no significant correlation with lamellar thickness or melting temperature.The growth of single crystals from solutions was greatly influenced by kinetic factors such as solvents,temperature,and concentration fluctuations,indicating that they were not thermodynamically stable crystals.

关 键 词：含团簇高分子 高分子单晶 多面体倍半硅氧烷 精准合成 

分 类 号：O631.2[理学—高分子化学]