Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (1): 20250332.doi: 10.7503/cjcu20250332

• Article • Previous Articles     Next Articles

Preparation and Properties of Modified Polydicyclopentadiene Elastomers Based on Blending with Low-molecular-weight Polymers

ZHANG Tingting1, LIU Dongli2(), TANG Jun1()   

  1. 1.College of Chemistry,Jilin University,Changchun 130012,China
    2.Shanghai Dongjie Polymer Materials Co. ,Ltd. ,Shanghai 201108,China
  • Received:2025-11-04 Online:2026-01-10 Published:2025-12-17
  • Contact: TANG Jun E-mail:shdongjie@163.com;chemjtang@jlu.edu.cn
  • Supported by:
    the Project of Science and Technology Development Plan of Jilin Province, China(20240302124GX)

Abstract:

High-performance polydicyclopentadiene(PDCPD) elastomeric materials were prepared by copolymeri-zing dicyclopentadiene(DCPD) with tricyclopentadiene(TCPD) and introducing a low-molecular-weight polybuta- diene(PB) with good compatibility for blending modification. The copolymerization of DCPD and TCPD allowed for the tuning of material rigidity; the introduction of PB decreased the crosslinking density, reduced the proportion of rigid cyclic structures, and provided a plasticizing effect, collectively transforming PDCPD from a rigid thermoset into a flexible elastomer. When the PB content(mass ratio to DCPD/TCPD mixture) reached 35%, the modified PDCPD exhibited a tensile strength of 12 MPa and an elongation at break of 296%, demonstrating a thermoset elastomeric behavior. Scanning electron microscopy of the tensile fracture surface, dynamic mechanical analysis, and thermogravimetric analysis indicated that PB existed in the system as a physically blended phase. Although excessive PB addition slightly deteriorated the water resistance, the maximum water absorption of the material remained below 0.9% after immersion in deionized water at 60 ℃ for 48 h. This study provided an effective approach to transforming PDCPD into an elastomer through blending modification with low-molecular-weight polymers.

Key words: Polydicyclopentadiene, Polybutadiene, Elastomer

CLC Number: 

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