蓖麻油改性聚氨酯网络结构的分子模拟与表征

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中图分类号：TQ323.8 文献标志码：A 文章编号：1008-0562（2026）01-0123-06

Molecular simulation and characterization of castor oil-modified polyurethane network structure

ZHOU Xinxing， TIAN Feng

（Institute ofResourcesand Environmental Engineering，Shanxi University，Taiyuan O3ooo6，China）

Abstract：To investigate the network structure of castor oil-modified polyurethane （BMP），molecular dynamics simulations，optical microscopy，scanning electron microscopy，and atomic force microscopy were used to study the effcts of different castor oil mass fractions on the micro-network structure of polyurethane （PU） from a microscopic and molecular scale perspective.The results show that the radius of gyration of polyurethane increases with the increase ofcastor oil mass fraction，reaching its maximum at acastor oil massfraction of 15% at which point the foam uniformity and network structure are the best.The crosslinking densityof castor oilmodified polyurethane also increases with the castor oil mass fraction;the molecular simulation and experimental results are in good agreement. Castor oil-modified polyurethane can form a distinct network structure，and the addition ofcastor oil changes the radius of gyration of molecular chains and the spatial structure of molecules in the polyurethane network.Moreover，the castor oil mass fraction exerts a significant influence on the uniformity of the polyurethane network structure.The study provides a basis for the development of castor oil-modified polyurethane waterproof groutingmaterials for mining applications.

Keywords： castor oil; polyurethane; network structure; molecular dynamic simulation; microscopic morphology; radius of gyration

0引言聚氨酯（PU）被广泛应用于制备弹性体、泡沫材料、涂层、黏结剂、纤维、热固性塑料和热塑性塑料[1-3]。（剩余9011字）