高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

基于低分子量聚合物共混的改性聚双环戊二烯弹性体制备与性能研究

张婷婷1，刘东立2，汤钧1   

  1. 1. 吉林大学化学学院
    2. 上海东杰高分子材料有限公司

  • 收稿日期:2025-11-04 修回日期:2025-12-17 出版日期:2025-12-17 发布日期:2025-12-17
  • 通讯作者: TANG Jun E-mail:chemjtang@jlu.edu.cn

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
    2. Shanghai Dongjie Polymer Materials Co.，Ltd.

  • Received:2025-11-04 Revised:2025-12-17 Online:2025-12-17 Published:2025-12-17

PDF (PC)

摘要： 本文通过双环戊二烯(DCPD)与三环戊二烯(TCPD)共聚，并利用具有良好相容性的低分子量聚丁二烯(PB)进行共混改性，制备了聚双环戊二烯(PDCPD)弹性体改性材料。DCPD与TCPD共聚可以调节材料刚性；PB的引入降低了体系交联度，减少了刚性环状结构比例，同时其增塑作用导致改性PDCPD由刚性热固性塑料向柔性弹性体转变。当PB添加量为单体混合物的35%(质量分数)时，PDCPD改性材料为拉伸强度12 MPa、断裂伸长率296%的热固性弹性体，同时其热分解温度未显著降低。拉伸断面扫描电镜图像、动态热机械分析及热重分析结果表明，PB在体系中以物理共混形式存在。尽管过多PB的引入会在一定程度上降低材料的耐水性，但在60 ℃去离子水中浸泡48 h后，其最大吸水率低于0.9%。本研究结果为低分子量聚合物共混改性PDCPD，使其转变为弹性体提供了有效途径。

关键词: 聚双环戊二烯, 聚丁二烯, 弹性体

Abstract: High-performance PDCPD elastomeric materials were prepared by copolymerizing dicyclopentadiene(DCPD) with tricyclopentadiene(TCPD) and introducing a low-molecular-weight polybutadiene(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, transforming PDCPD from a rigid thermoset into a flexible elastomer. When the PB content reached 35%(mass fraction), 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

中图分类号: 

TrendMD: