环氧丁羟型聚氨酯弹性体的制备与性能

曹哲; 介素云; 李伯耿

doi:10.11777/j.issn1000-3304.2017.16346

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环氧丁羟型聚氨酯弹性体的制备与性能

研究论文 | 更新时间：2021-01-26

- 环氧丁羟型聚氨酯弹性体的制备与性能
- Preparation and Properties of Epoxided Hydroxyl-terminated Polybutadiene Based Polyurethane Elastomers
- 高分子学报 2017年第8期页码：1350-1357
- 作者机构：
  
  化学工程联合国家重点实验室浙江大学化学工程与生物工程学院杭州 310027
- 作者简介：
  
  介素云, E-mail:jiesy@zju.edu.cn Su-yun Jie, E-mail:jiesy@zju.edu.cn
- 基金信息：
  
  浙江省自然科学基金(LY16B040001);国家自然科学基金(21536011)
- DOI：10.11777/j.issn1000-3304.2017.16346
  中图分类号：
- 纸质出版日期：2017-8，
  
  收稿日期：2016-12-2，
  
  修回日期：2017-1-4，
扫描看全文
曹哲, 介素云, 李伯耿. 环氧丁羟型聚氨酯弹性体的制备与性能[J]. 高分子学报, 2017,(8):1350-1357.

Cao Zhe, Jie Su-yun, Li Bo-geng. Preparation and Properties of Epoxided Hydroxyl-terminated Polybutadiene Based Polyurethane Elastomers[J]. Acta Polymerica Sinica, 2017,(8):1350-1357.
曹哲, 介素云, 李伯耿. 环氧丁羟型聚氨酯弹性体的制备与性能[J]. 高分子学报, 2017,(8):1350-1357. DOI： 10.11777/j.issn1000-3304.2017.16346.

Cao Zhe, Jie Su-yun, Li Bo-geng. Preparation and Properties of Epoxided Hydroxyl-terminated Polybutadiene Based Polyurethane Elastomers[J]. Acta Polymerica Sinica, 2017,(8):1350-1357. DOI： 10.11777/j.issn1000-3304.2017.16346.

摘要

以间氯过氧苯甲酸（

CPBA）为氧化剂对降解法制备的端羟基聚丁二烯（DHTPB）中的部分双键进行环氧化改性，通过控制

CPBA和双键的比例制得具有不同环氧率的环氧化端羟基聚丁二烯（EHTPB），经

H-NMR分析测试表明EHTPB的环氧率分别为5%、10%和15%，与设计值基本一致.进一步以EHTPB为多元醇、4，4'-二苯基甲烷二异氰酸酯（MDI）为异氰酸酯、1，4-丁二醇为扩链剂制备了环氧丁羟型聚氨酯弹性体（EPU），并对其性能进行了测试，研究结果表明：丁羟胶的环氧化改性对聚氨酯弹性体的力学性有着一定的提升作用，其杨氏模量和拉伸强度随环氧率的上升而提高，而断裂伸长率则随环氧率的上升有所下降；环氧丁羟型聚氨酯弹性具有优异的弹性恢复能力；环氧化改性后，聚氨酯弹性体的热稳定性有一定程度的提高；聚氨酯弹性体的玻璃化转变温度随环氧率的上升而升高.

Abstract

The C=C double bonds in the main chain of hydroxyl-terminated polybutadiene (DHTPB)

obtained by the degradation of polybutadiene rubber

were partially epoxided using

-chloroperoxybenzoic acid (

CPBA) as epoxidation reagent. A series of epoxided HTPBs (EHTPB) with different epoxy contents (5%

10% and 15%) were prepared by tuning the molar ratio of

CPBA to C=C double bonds. The structures of EHTPBs were characterized by Fourier transform-infrared (FTIR)

nuclear magnetic resonance (

H-NMR) spectroscopy and gel permeation chromatography (GPC). The epoxy percent in EHTPBs from

H-NMR spectra was in accordance with the design. In addition

a series of EHTPB-based polyurethane elastomers (EPU) were prepared by the reaction between EHTPB and 4

4'-diphenylmethane diisocyanate with 1

4-butanediol as a chain extender. Mechanical and thermal properties of the EPU samples were characterized by tensile test

differential scanning calorimetry (DSC) and thermal gravity analysis (TGA). With increased epoxy percent in EHTPB

the Young's modulus and the tensile strength of the EPU samples increased

whereas the elongation at break decreased. The sample EPU10 prepared with 10% of epoxy had the best mechanical properties with 8.82 MPa as Young's modulus

7.83 MPa as tensile strength

and (485 ±23)% as elongation at break. The elasticity recovery of the EPU sample was slightly better than HTPB-based PU (EPU0). The results with TGA test showed that the thermal degradation of EPU

similar to EPU0

was divided into three stages. However

the EPU samples had better thermal stability with the initial degradation temperature at 210℃

about 30℃ higher than that of EPU0. The DSC results showed that the glass transition temperature (

) of EPU gradually increased as epoxy percent was increased

though still lower than that of HTPB (FHTPB) based PUs prepared by free-radical polymerization.

关键词

聚氨酯弹性体丁羟胶环氧化力学性能热性能

Keywords

Polyurethane elastomerHydroxyl-terminated polybutadieneEpoxidationMechanical propertiesThermal properties

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