化工进展 ›› 2022, Vol. 41 ›› Issue (S1): 382-388.DOI: 10.16085/j.issn.1000-6613.2022-0021

• 材料科学与技术 • 上一篇    下一篇

交联型特辛基酚醛树脂酚羟基间位的溴化改性

刘大晨1(), 杜明慧1(), 王衡2   

  1. 1.沈阳化工大学材料科学与工程学院,辽宁 沈阳 110142
    2.辽宁顺风新材料科技有限公司沈阳先进涂层材料 产业技术研究院,辽宁 沈阳 110031
  • 收稿日期:2022-01-04 修回日期:2022-03-08 出版日期:2022-10-20 发布日期:2022-11-10
  • 通讯作者: 杜明慧
  • 作者简介:刘大晨(1965—),男,教授,研究方向为高分子材料与工程。E-mail:liudachen@sina.com

Bromination modification of phenolic hydroxyl sites of crosslinked teroctyl phenolic resin

LIU Dachen1(), DU Minghui1(), WANG Heng2   

  1. 1.Shenyang University of Chemical Technology, School of Materials Science and Engineering, Shenyang 110142, Liaoning, China
    2.Liaoning Shunfeng New Material Technology Co. , Ltd. , Shenyang Institute of Industrial Technology Co. , Ltd. for Advanced Coating Materials, Shenyang 110031, Liaoning, China
  • Received:2022-01-04 Revised:2022-03-08 Online:2022-10-20 Published:2022-11-10
  • Contact: DU Minghui

摘要:

以交联型特辛基酚醛树脂为原料进行改性,得到了一种交联型酚羟基间位溴化特辛基酚醛树脂,采用红外光谱(FTIR)、核磁碳谱(NMR)对树脂的结构进行了表征,结果表明成功地在酚羟基的间位上取代上了溴。采用莫尔法滴定反应测定剩余溴含量,计算得到苯环上的溴化率为84.7%。采用凝胶渗透色谱(GPC)对改性前后的酚醛树脂进行表征,结果表明经过溴化改性的酚醛树脂的数均分子量、重均分子量有所降低,分子量分布变窄。根据交联型特辛基酚醛树脂的交联机理,分别对交联型特辛基酚醛树脂、交联型链端溴化特辛基酚醛树脂树脂和交联型酚羟基间位溴化特辛基酚醛树脂交联橡胶的硫化历程和物理力学性能进行测试,结果表明改性后的酚羟基间位溴化特辛基酚醛树脂交联橡胶的硫化程度、硫化速度、力学性能都有明显提升。

关键词: 交联型特辛基酚醛树脂, 酚羟基间位溴化, 交联机理, 力学性能

Abstract:

A crosslinked teroctyl phenolic resin with brominated phenol hydroxyl group was obtained by modifying the crosslinked teroctyl phenolic resin. The structure of the resin was characterized by FTIR and NMR. The results showed that bromine was successfully substituted on the phenol hydroxyl group. The residual bromine content was determined by Mohr titration reaction. The bromination rate on the benzene ring was calculated to be 84.7%. GPC was used to characterize the phenolic resin before and after modification. The results indicated that the number average molecular weight and weight average molecular weight of the brominated phenolic resin decreased, and the molecular weight distribution narrowed. According to the crosslinking mechanism of crosslinked teoctyl phenolic resin, the vulcanization process and physical and mechanical properties of rubber coordination systems of crosslinked teoctyl phenolic resin, crosslinked chain end brominated teoctyl phenolic resin and crosslinked phenolic hydroxyl meta brominated teoctyl phenolic resin were tested respectively. The results showed that the vulcanization degree, vulcanization speed and physical and mechanical properties of the modified phenolic hydroxyl meta brominated teoctyl phenolic resin were significantly improved.

Key words: p-teroctyl phenolic resin, phenol hydroxyl meta bromination, crosslinking mechanism, physical and mechanical properties

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