Rheological Properties of Cyclic Olefin Polymers and Cyclic Olefin Copolymers

WANG Yu; YOU Wei

doi:10.14028/j.cnki.1003-3726.2024.24.255

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Rheological Properties of Cyclic Olefin Polymers and Cyclic Olefin Copolymers

更新时间：2025-01-23

- Rheological Properties of Cyclic Olefin Polymers and Cyclic Olefin Copolymers
- Polymer Bulletin Vol. 38, Issue 2, Pages: 370-380(2025)
- 作者机构：
  
  1.中国科学院化学研究所，北京分子科学国家研究中心，中国科学院工程塑料重点实验室，北京 100190
  2.中国科学院大学，北京 100049
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2024.24.255
  CLC：
- Received：02 September 2024，
  
  Accepted：11 October 2024，
  
  Published Online：21 November 2024，
  
  Published：20 February 2025
- 稿件说明：
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王煜, 尤伟. 环烯烃聚合物与环烯烃共聚物的流变性能研究. 高分子通报, 2025, 38(2), 370–380

Wang, Y.; You, W. Rheological properties of cyclic olefin polymers and cyclic olefin copolymers. Polym. Bull. (in Chinese), 2025, 38(2), 370–380
王煜, 尤伟. 环烯烃聚合物与环烯烃共聚物的流变性能研究. 高分子通报, 2025, 38(2), 370–380 DOI： 10.14028/j.cnki.1003-3726.2024.24.255.

Wang, Y.; You, W. Rheological properties of cyclic olefin polymers and cyclic olefin copolymers. Polym. Bull. (in Chinese), 2025, 38(2), 370–380 DOI： 10.14028/j.cnki.1003-3726.2024.24.255.

摘要

环烯烃聚合物(COP)与环烯烃共聚物(COC)分别由降冰片烯衍生物通过烯烃开环易位聚合再氢化、降冰片烯衍生物与乙烯单体加成共聚反应两种方式制备而得。由于其优异的性能，COP和COC已经成为全球医疗包装和光学产品消费领域的重要材料。通过比较它们的流变特性对温度的依赖性，发现COP的熔体黏度高于COC。Arrhenius方程式的分析结果显示光学级COP样品F52R的流动活化能明显高于其他样品。利用温度-时间重叠原理建构各样品的主曲线，成功得到各自的缠结模量

，并结合热机械分析仪(TMA)结果进一步决定缠结分子量(

)。COC的

可达16~18 kDa，约为COP结果的3~4倍。该研究结果不仅为材料加工参数的选择提供了依据，也能加深读者对COP与COC本征特性差异的理解。

Abstract

Cycloolefin polymers (COPs) and cycloolefin copolymers (COCs) are synthesized from norbornene derivatives using two respective methods: ring-opening metathesis polymerization followed

by hydrogenation

and addition copolymerization with ethylene monomers. Recognized for their excellent performance

COPs and COCs have become the important materials in the global medical packaging and optical product sectors in recent years. A comparison of the temperature dependence of rheological properties reveals that COPs exhibit a higher melt viscosity than COCs. The Arrhenius equation analysis indicates that the optical-grade COP sample F52R has a notably higher flow activation energy compared to other samples. By the time-temperature superposition principle

master curves for each sample were constructed

yielding the entanglement modulus (

). The entanglement molecular weight (

) is further determined with the TMA results for each sample. It was found that COCs’

can reach 16–18 kDa

which is approximately 3–4 times that of COPs’. These findings are expected to guide the selection of processing parameter in the COP and COC industries

and provide new insights in the intrinsic property differences between COPs and COCs.

关键词

Keywords

references

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