引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 2963次   下载 102 本文二维码信息
码上扫一扫!
甲阶酚醛树脂的贮存稳定性
吴红林,张德震,王雄,陆士平
0
(华东理工大学材料科学与工程学院, 上海 200237;上海富晨化工有限公司, 上海 200233)
摘要:
甲阶酚醛树脂在贮存过程中容易自缩聚,稳定性低。采用两种方法对其进行改性:一种是引入氯丙烯以降低羟甲基活性,另一种是合成高邻位酚醛树脂并加入聚乙二醇。通过红外光谱(FT-IR)、差示扫描量热法(DSC)分别表征了改性前后树脂的基团变化、热性能,并进行了固化动力学分析,考察了酚醛树脂的黏度变化以研究其贮存性能。研究表明:成功地运用这两种方法合成了改性树脂,且热分析结果说明羟甲基的活性有所减弱;固化动力学结果表明树脂活化能变化较小,说明树脂贮存稳定性提高且对固化影响不大,烯丙基改性将酚醛树脂的贮存期由30 d提高到108 d,聚乙二醇改性后也可以贮存至108 d。
关键词:  甲阶酚醛树脂  贮存稳定性  氯丙烯  高邻位  聚乙二醇
DOI:10.14135/j.cnki.1006-3080.2017.03.006
投稿时间:2016-09-18
基金项目:
Storage Stability for Phenolic Resol Resin
WU Hong-lin,ZHANG De-zhen,WANG Xiong,LU Shi-ping
(School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;Shanghai Fuchen Chemical Co. Ltd, Shanghai 200233, China)
Abstract:
During storage self-condensation is easy to occur for phenolic resol resin with low stability. In this article,two ways were used to modify the phenolic resol resins.One was to decrease the activation of hydroxymethyl by introduction of allyl chloride,the other was to introduce polyethylene glycoland to synthesize high ortho phenolic resol.The change of functional groups in phenolic resol resins before and after modification was characterized by infrared spectroscopy (FT-IR).The thermal properties and the curing kinetics were characterized by differential scanning calorimety (DSC).The storage properties of the phenolic resol resins were observed by viscosity.The results indicated that two modified phenolic resol resins were successfully prepared and the hydroxyl group activation was decreased,while the activation energy was changed little as showed by the curing kinetics,which indicated the increase in storage stability with less effect on curing.The storage period of the phenolic resin after modification by allylation could be increased from 30 d to 108 d.After modification by polyethylene glycol,the storage period also reached 108 d.
Key words:  phenolic resole resin  storage stability  allyl chloride  high ortho  polyethylene glycol

用微信扫一扫

用微信扫一扫