聚醚酯多嵌段共聚物对不饱和聚酯树脂的增韧增强研究

曹文璐; 陈鹏; 杨语欣; 陈欢; 忻锋光; 王超; 徐林; 李晓虹; 屠迎锋

doi:10.11777/j.issn1000-3304.2025.25098

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聚醚酯多嵌段共聚物对不饱和聚酯树脂的增韧增强研究

研究论文 | 更新时间：2025-06-13

- 聚醚酯多嵌段共聚物对不饱和聚酯树脂的增韧增强研究
- Enhancing the Toughness and Strength of Unsaturated Polyester Resin by Poly(ether ester) Multiblock Copolymers
- 高分子学报 2025年页码：1-11
- 作者机构：
  
  1.江苏省新型高分子功能材料工程研究中心苏州大学材料与化学化工学部苏州 215123
  2.宁波堇天材料科技有限公司宁波 315191
  3.中石化(北京)化工研究院有限公司燕山分公司橡塑新型材料合成国家工程研究中心北京 102500
- 作者简介：
  
  E-mail: lxh83@suda.edu.cn
  tuyingfeng@suda.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 ┣22231008);22071167┫
- DOI：10.11777/j.issn1000-3304.2025.25098
  中图分类号：
- CSTR：32057.14.GFZXB.2025.7425
- 收稿日期：2025-04-11，
  
  录用日期：2025-05-23，
  
  网络出版日期：2025-06-12，
- 稿件说明：
移动端阅览
曹文璐, 陈鹏, 杨语欣, 陈欢, 忻锋光, 王超, 徐林, 李晓虹, 屠迎锋. 聚醚酯多嵌段共聚物对不饱和聚酯树脂的增韧增强研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25098

Cao, W. L.; Chen, P.; Yang, Y. X.; Chen, H.; Xin, F. G.; Wang, C.; Xu, L.; Li, X. H.; Tu, Y. F. Enhancing the toughness and strength of unsaturated polyester resin by poly(ether ester) multiblock copolymers. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25098
曹文璐, 陈鹏, 杨语欣, 陈欢, 忻锋光, 王超, 徐林, 李晓虹, 屠迎锋. 聚醚酯多嵌段共聚物对不饱和聚酯树脂的增韧增强研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25098 DOI： CSTR： 32057.14.GFZXB.2025.7425.

Cao, W. L.; Chen, P.; Yang, Y. X.; Chen, H.; Xin, F. G.; Wang, C.; Xu, L.; Li, X. H.; Tu, Y. F. Enhancing the toughness and strength of unsaturated polyester resin by poly(ether ester) multiblock copolymers. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25098 DOI： CSTR： 32057.14.GFZXB.2025.7425.

摘要

不饱和聚酯树脂固化后具有优异的性能，但存在脆性大、韧性差的缺点，需要进行增韧改性. 嵌段共聚物可用于不饱和聚酯树脂的增韧改性，但有关嵌段数目、长度等对性能的影响尚鲜见报道. 本研究将聚醚酯多嵌段共聚物作为增韧改性剂，研究了其嵌段数目、长度等结构对不饱和聚酯树脂固化物性能的影响. 以麝香T(EB)和不同分子量的聚四氢呋喃(PTMO)二醇通过开环-缩合级联聚合，制备了具备不同嵌段数目(即总分子量)和嵌段链段长度的(PEB-

-PTMO-

-PEB)

聚醚酯多嵌段共聚物. 将其与不饱和聚酯树脂共混，加入引发剂加热交联后制备得到改性不饱和聚酯树脂固化物. 结果表明，添加少量的多嵌段共聚物(1 wt%~5 wt%)即可显著增加树脂固化物的拉伸强度、杨氏模量、缺口抗冲击强度和韧性，最高可分别提升48%、31%、20%和178%. 在其他因素不变的情况下，固化物的强度、断裂伸长率、韧性随嵌段共聚物添加量或嵌段数目的增加而增加，缺口抗冲击强度变化不大，而模量则略有下降. 另一方面，随嵌段链段长度的增加，固化物的强度、模量和韧性略有增加. 上述结果说明多嵌段共聚物较两嵌段或三嵌段共聚物在增韧改性方面具有明显的优势，为不饱和聚酯树脂的增韧增强改性提供了新思路.

Abstract

Unsaturated polyester resins have excellent properties after curing

but suffer from inherent brittleness and poor toughness

which requires toughening modification. Block copolymers can be used for toughening modification of unsaturated polyester resins

but the effect of block number and block segmental length on the mechanical properties has rarely been reported. In this study

poly(ether ester) multiblock copolymers (mBCPs) were used as toughening modifiers

and the effects of their structure

such as block number and segmental length

on the properties of the cured unsaturated polyester resins were investigated. A series of (PEB-

-PTMO-

-PEB)

mBCPs with different block numbers

i.e.

total molecular weights and block segment length

were synthesized

via

a cascade polycondensation-coupling ring-opening polymerization using ethylene brassylate (EB) and poly(tetramethylene oxide) (PTMO) diols with different molecular weights as monomers. The modified cured unsaturated polyester resins were prepared by mixing the mBCPs with unsaturated polyester resins

adding an initiator

and subsequently heating to induce crosslinking. The results indicate that the addition of a small amount of mBCPs (1~5 wt%) can significantly enhance the tensile strength

Young's modulus

notched impact strength

and toughness of the cured resins

up to 48%

31%

20%

and 178%

respectively. With other factors held constant

the strength

elongation at break

and toughness of the cured resins increased with the addition amount of mBCPs or block number

while the notched impact strength did not change much

and modulus decreased slightly. Additionally

the strength

modulus

and toughness of the cured resins increased slightly with the increment of segmental length. The above results demonstrate that mBCPs exhibit significant advantages over diblock or triblock copolymers in toughening mo

dification

providing a novel approach for the property modification of unsaturated polyester resins.

关键词

Keywords

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