Study on Properties of Epoxy Resin Modified with 669 Diluent Extended with Urethane Linkage

Yu LI; Jin-fei DENG; Shi-yi YU; Zhao-yi SUN; Qiu-hua RAO; Zhi-yuan MEI

doi:10.14028/j.cnki.1003-3726.2019.11.004

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Study on Properties of Epoxy Resin Modified with 669 Diluent Extended with Urethane Linkage

更新时间：2022-09-05

- Study on Properties of Epoxy Resin Modified with 669 Diluent Extended with Urethane Linkage
- Polymer Bulletin Vol. 32, Issue 11, Pages: 33-39(2019)
- 作者机构：
  
  1.海军工程大学，武汉 430033
  2.武汉海威船舶与海洋工程科技有限公司，武汉 430033
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2019.11.004
  CLC：
- Published：20 November 2019，
  
  Received：10 December 2018，
  
  Revised：13 August 2019，
扫描看全文
Yu LI, Jin-fei DENG, Shi-yi YU, Zhao-yi SUN, Qiu-hua RAO, Zhi-yuan MEI. Study on Properties of Epoxy Resin Modified with 669 Diluent Extended with Urethane Linkage. [J]. Polymer Bulletin 32(11):33-39(2019)
DOI：

Yu LI, Jin-fei DENG, Shi-yi YU, Zhao-yi SUN, Qiu-hua RAO, Zhi-yuan MEI. Study on Properties of Epoxy Resin Modified with 669 Diluent Extended with Urethane Linkage. [J]. Polymer Bulletin 32(11):33-39(2019) DOI： 10.14028/j.cnki.1003-3726.2019.11.004.

摘要

制备了氨酯键扩链改性的669稀释剂UE6M，考察了加入不同用量的UE6M对环氧树脂进行稀释后环氧树脂混合体系的粘度变化。使用氰乙基化三乙烯四胺作为固化剂对环氧树脂混合体系进行固化，研究了UE6M的用量对环氧树脂混合体系固化物性能的影响。研究结果表明，UE6M对E51环氧树脂具有较好的稀释效果，且混合体系固化产物的韧性较纯环氧树脂固化物明显增强：UE6M用量为30%和40%的混合体系粘度仅为纯E51环氧树脂粘度的6.35%和1.43%，但其固化物的拉伸强度均在60MPa以上，分别为纯E51环氧树脂固化物的87.9%和80.9%。断裂伸长率均为纯环氧树脂固化物的8倍以上，弯曲应变为纯环氧树脂固化物2倍以上，弯曲强度及弯曲模量等未出现大幅下降，UE6M稀释剂加入环氧树脂后固化产物的韧性得到明显增强。

Abstract

A novel epoxy resin toughening diluent (UE6M) containing epoxy polyurethane was synthesized by the coupling reaction of diphenyl-methane-diisocyanate(MDI) and domestic epoxy diluent 669. Different dosages of UE6M were added to pure epoxy resin(E51) to form epoxy blends

we recorded the viscosity changes of the blends with different content of UE6M

results showed that compared with pure epoxy resin(E51)

the epoxy resin toughening diluent(UE6M)had a dramatically dilution effect on epoxy resin(E51)

the viscosity of the mixed system with 30% and 40% UE6M were only 6.35% and 1.43%

respectively

of that of pure epoxy resin(E51). And then

the blends were cured with acetonitrile triethylenetetramine

we studied the effect of UE6M usages to the properties of the cured blends. Dynamic mechanical test and other mechanical test results confirmed the addition of UE6M to pure epoxy resin could induce toughening effect obviously: the tensile strengths of cured blends with 30% and 40% UE6M were 87.9% and 80.9% of that of the cured pure E51 epoxy resin

all exceed 60MPa! While the bending strength and modulus did not decrease significantly

the elongation at break was more than 8 times that of the cured epoxy resin

and the bending strain was more than 2 times that of the cured epoxy resin.

关键词

669稀释剂氨酯键环氧树脂改性

Keywords

669 DiluentUrethane bondEpoxy resinModification

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