Preparation and Properties Study of PPG-based Polyurethane Using Glycerol as Chain Extender

HOU Fangjian, ZHANG Yulin, QIAO Wenqiang, WANG Zhiyuan

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (03) : 100-103. DOI: 10.15925/j.cnki.issn1005-3360.2025.03.018
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Preparation and Properties Study of PPG-based Polyurethane Using Glycerol as Chain Extender

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Abstract

Three prepolymers with different —NCO group mass fractions of 2.6%, 3.6%, and 5.6% were prepared using polypropylene glycol (PPG) and toluene diisocyanate (TDI). Polyurethane elastomers were then synthesized using glycerol as chain extender. The effects of the —NCO group content on the mechanical properties and thermal properties of the polyurethane elastomers were investigated. The results showed that as the —NCO group content increased, the glass transition temperature of the polyurethane elastomers rose, the tensile strength increased by 1.76 MPa, the storage modulus increased, the Shore A hardness improved by 20 units, while the internal damping and elongation at break gradually decreased. Among them, the polyurethane elastomer prepared from the prepolymer with a —NCO group mass fraction of 5.6% exhibited the best thermal and mechanical properties.

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Polypropylene glycol / Glycerol / Polyurethane elastomer

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HOU Fangjian , ZHANG Yulin , QIAO Wenqiang , et al. Preparation and Properties Study of PPG-based Polyurethane Using Glycerol as Chain Extender. Plastics Science and Technology. 2025, 53(03): 100-103 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.03.018

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