Study on Properties of Silica Sol Hybrid Modified Epoxy Resin

Liu-li CHEN; Wei-qu LIU; Zheng-fang WANG

doi:10.14028/j.cnki.1003-3726.2019.04.007

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Study on Properties of Silica Sol Hybrid Modified Epoxy Resin

更新时间：2022-09-02

- Study on Properties of Silica Sol Hybrid Modified Epoxy Resin
- Polymer Bulletin Vol. 32, Issue 4, Pages: 48-55(2019)
- 作者机构：
  
  1.中国科学院广州化学研究所，广州 510650
  2.中国科学院纤维素化学重点实验室，广州 510650
  3.中国科学院大学，北京 100049
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2019.04.007
  CLC：
- Published：20 April 2019，
  
  Received：03 August 2018，
  
  Revised：27 December 2018，
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Liu-li CHEN, Wei-qu LIU, Zheng-fang WANG. Study on Properties of Silica Sol Hybrid Modified Epoxy Resin. [J]. Polymer Bulletin 32(4):48-55(2019)
DOI：

Liu-li CHEN, Wei-qu LIU, Zheng-fang WANG. Study on Properties of Silica Sol Hybrid Modified Epoxy Resin. [J]. Polymer Bulletin 32(4):48-55(2019) DOI： 10.14028/j.cnki.1003-3726.2019.04.007.

摘要

正硅酸乙酯在碱性条件下常温水解得到硅溶胶杂化物，并进而通过硅溶胶杂化改性方法制备了一系列改性环氧树脂。通过对化学改性产物的红外光谱、环氧值的测定，表明杂化改性方法能将硅溶胶成功引入到环氧树脂中。将所得改性环氧树脂用异佛尔酮二胺（IPDA）固化，对所得固化物的阻燃性、玻璃化转变温度（T

）、热稳定性、拉伸强度及断裂伸长率、微观结构进行了分析测定，探讨了化学改性与物理混合方法、硅溶胶含量等对材料性能的影响。结果表明：经过化学反应得到的改性环氧树脂具有更加优良的性能，固化产物的极限氧指数、热稳定性明显高于纯环氧树脂，拉伸强度等力学性能得到大幅度提高，达到了同时提高环氧材料的阻燃性、耐热性能和力学性能的目标。

Abstract

silica sol hybrid was synthesized by the hydrolysis reaction of ethyl silicate(TEOS) at 25℃ under alkaline conditions.Then a series of modified epoxy resins were successfully prepared by using the silica sol hybrid. IR spectrum

epoxy value indicated that the silica sol hybrid is incorporated into epoxy resin. The modified epoxy resin was cured with isophorone diamine (IPDA)

Then investigated the cured materials via measuring the flame retardancy

glass transition temperature (

)

thermal stability

tensile strength and elongation

microstructure of the cured materials

The effects of chemical modification

physical mixing and the content of the TOES on the properties of the composites were discussed. The results show that the modified epoxy resin obtained by chemical reaction has better performance. The limiting oxygen index and thermal stability of the cured product are obviously higher than that of pure epoxy resin

and the tensile strength and other mechanical properties have been greatly improved

which achieved that the flame retardant

heat resistance and mechanical properties of the epoxy materials were increased at the same time.

关键词

环氧树脂阻燃性热性能硅溶胶

Keywords

Epoxy resinFlame retardantThermal propertiesSilicate-sol

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