Preparation and Properties of Novolac Resin Modified by Siloxane

Wen-tao ZHANG; Hao LI; Zhen-hua LUO; Tong ZHAO

您当前的位置：

首页 >

文章列表页 >

Preparation and Properties of Novolac Resin Modified by Siloxane

更新时间：2022-09-18

- Preparation and Properties of Novolac Resin Modified by Siloxane
- Polymer Bulletin Vol. 27, Issue 10, Pages: 77-85(2014)
- 作者机构：
  
  中国科学院化学研究所，北京　100190
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014-10，
  
  Received：26 February 2014，
  
  Revised：03 June 2014，
扫描看全文
Wen-tao ZHANG, Hao LI, Zhen-hua LUO, Tong ZHAO. Preparation and Properties of Novolac Resin Modified by Siloxane. [J]. Polymer Bulletin 27(10):77-85(2014)
DOI：

Wen-tao ZHANG, Hao LI, Zhen-hua LUO, Tong ZHAO. Preparation and Properties of Novolac Resin Modified by Siloxane. [J]. Polymer Bulletin 27(10):77-85(2014) DOI：

摘要

为了提高酚醛树脂的热稳定性，采用甲基三甲氧基硅烷(MTMS)对线性酚醛树脂(Novolac)进行改性，通过酯交换反应制得分子级硅氧烷改性线性酚醛树脂(SN)，研究了催化剂种类、反应时间以及反应温度对 SN分子量的影响，结果表明，最佳催化剂为冰醋酸，最佳反应时间为4~6h，最佳减压蒸馏温度为110℃。对 SN结构的表征表明，Si-CH

和Si-O-CH

基团成功引入到Novolac的酚羟基上，且硅氧烷单体的一个甲氧基与Novolac的酚羟基发生的反应为主要反应。SN固化物的热稳定性结果表明，相比Novolac，在氮气气氛下，SN100固化物最大分解速率温度提高了 80℃，最大分解速率降低了 42.94%，1000℃的残碳率提高了 8. 97%，即是说硅氧烷的引入可显著提高Novolac的热稳定性。

Abstract

Methyltrimethoxysilane(MTMS) was used to modify novolac resin (Novolac) to improve the thermal stability of Novolac. Siloxane-modified novolac resin (SN) was prepared by ester exchange reaction at the molecular level. The influence of catalysts

reaction time and reaction temperature on the molecular weight of SN was investigated

the results showed that

the best catalyst was acetic acid

the most appropriate reaction time was 4 to 6 hours

and the optimum vacuum distillation temperature was 110℃. The results of structural characterization of SN showed that the reaction of one methoxy group of MTMS and phenolic hydroxyl groups of Novolac occupied the dominant position. The results of thermal stability of cured SN showed that

compared to cured Novolac

under nitrogen atmosphere

the maximum decomposition rate temperature of cured SN100 increased by 80℃

the maximum decomposition rate decreased by 42. 94 %

and the char yield at 1000℃ increased by 8. 97%

meaning that the introduction of siloxane could greatly enhance the thermal stability of Novolac.

关键词

硅氧烷线性酚醛热稳定性

Keywords

SiloxaneNovolac resinThermal stability

references

更多指标>

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Preparation and Thermal Stability of High Heat-resistant Poly(butylene succinate)

Bulky Backbone Strategy in α-Diimine Nickel and Palladium Catalyzed-Olefin Polymerization

Hydrophilic Modification of C.I. Pigment Red 31 and Its Application in Water-based Ink

Progress of the Effects of Inorganic Substance on Thermal Properties of Starch Plastics

Organic Modification of Clay for Polymer/Clay Nanocomposites

Related Author

No data

Related Institution

School of Textile Science and Engineering, Tiangong University

State Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering, Ningxia University

School of Material Science and Engineering, Tiangong University

School of Materials Science and Engineering, Sun Yat-sen University

Nanjing Forestry University

⁰