Preparation and Properties Study of Polyurethane Filling Materials

DU Zongao, ZHANG Yulin, SUN Jianing, QIAO Wenqiang, WANG Zhiyuan

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (01) : 109-114. DOI: 10.15925/j.cnki.issn1005-3360.2025.01.020
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Preparation and Properties Study of Polyurethane Filling Materials

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Abstract

Polyurethane elastomers were prepared by the prepolymerization method using toluene diisocyanate (TDI), polytetrahydrofuran diol (PTMEG), self-made mixed chain extender and filling oil as raw materials. The effects of the mole ratio of trifunctional chain extender to difunctional chain extender in the self-made mixed chain extender and the amount of filling oil on the properties of polyurethane elastomers were investigated. The results show that the composition of the mixed chain extender has the most significant effect on the mechanical properties of the polyurethane elastomer. With the increase of the amount of three-functional chain extender, the glass transition temperature, energy storage modulus and hardness of the polyurethane elastomers gradually increase, the tensile strength first increases and then decreases, and the internal friction and elongation at break gradually decrease. Among them, the comprehensive mechanical properties of the sample PU-3 are the best. The glass transition temperature, energy storage modulus, tensile strength and hardness of polyurethane elastomers decrease gradually with the increase of the amount of filling oil, and the internal friction and elongation at break tend to increase.

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Polyurethane elastomer / Mixed chain extender / Filling oil

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DU Zongao , ZHANG Yulin , SUN Jianing , et al . Preparation and Properties Study of Polyurethane Filling Materials. Plastics Science and Technology. 2025, 53(01): 109-114 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.01.020

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