紫外光引发环氧树脂的下行前线聚合行为

doi:10.7503/cjcu20140996

高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (5): 1019.doi: 10.7503/cjcu20140996

紫外光引发环氧树脂的下行前线聚合行为

周建萍¹(), 贾仕君¹, 傅万里^1,², 赵海芳¹, 刘志雷¹

1. 南昌航空大学材料科学与工程学院, 南昌330063
2. Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane 4072

收稿日期:2014-11-11 出版日期:2015-05-10 发布日期:2015-04-13
作者简介:联系人简介: 周建萍, 女, 博士, 副教授, 主要从事功能高分子材料和新型聚合方法研究. E-mail: zf161162@163.com
基金资助:
国家自然科学基金(批准号: 51363017, 51303078)资助

Curing of Epoxy Resin by UV-light Triggered Descending Frontal Polymerization^†

ZHOU Jianping^1,^*(), JIA Shijun¹, FU Wanli^1,², ZHAO Haifang¹, LIU Zhilei¹

1. School of Material Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2. Australian Institute for Bioengineering and Nanotechnology, University of Queensland, Brisbane 4072, Australia

Received:2014-11-11 Online:2015-05-10 Published:2015-04-13
Contact: ZHOU Jianping E-mail:zf161162@163.com
Supported by:
† Supported by the National Natural Science Foundation of China(Nos.51363017, 51303078)

摘要/Abstract

摘要：

采用紫外光(UV)引发法研究了221型脂环族环氧树脂的下行前线聚合行为. 探讨了光引发剂、热引发剂用量和预热温度等对聚合前线的推动速率V_f和前线引发时间t_i的影响, 并利用傅里叶变换红外光谱(FTIR)、热重(TG)和差示扫描量热(DSC)等对固化物结构和热性能进行了表征. 研究结果表明, 提高光引发剂浓度、热引发剂浓度或预热温度, 均可提高聚合前线的推动速率V_f, 缩短引发时间t_i. 采用该技术制备的环氧树脂固化物具有较好的均一性及热稳定性.

关键词: 前线聚合, 环氧树脂, 紫外光引发, 推动速率, 热性能

Abstract:

221 type alicyclic epoxy resin was cured by UV-light initiated descending frontal polymerization. The effect of amount of photo/thermal initiator, pre-heating temperature on the frontal velocity V_f and frontal initiating time t_i was investigated. The structure and thermal properties of the cured products were characterized via Fourier transform infrared spectroscopy(FTIR), thermogravimetric analysis(TG) and differential scanning calorimetry(DSC). The results show that frontal velocity V_f increase with increasing of concentration of photo/thermal initiator or preheating temperature, while frontal initiating time decrease. Analysis of the FTIR spectrum indicates that the products were obtained uniformly. TG and DSC results reveal that the products exhibit good thermal stability.

Key words: Frontal polymerization, Epoxy resin, UV-light initiating, Heading velocity, Thermal property

TrendMD:

周建萍, 贾仕君, 傅万里, 赵海芳, 刘志雷. 紫外光引发环氧树脂的下行前线聚合行为. 高等学校化学学报, 2015, 36(5): 1019.

ZHOU Jianping, JIA Shijun, FU Wanli, ZHAO Haifang, LIU Zhilei. Curing of Epoxy Resin by UV-light Triggered Descending Frontal Polymerization^†. Chem. J. Chinese Universities, 2015, 36(5): 1019.

图/表 12

Fig.1 Scheme of the experiment equipment

Fig.2 Mechanism of UV-ignited frontal polymerization

Fig.3 Scheme of photo-frontal polymerization propagationa. Photo-initiating stage; b—i. propagation of polymeriza-

Fig.4 Polymerization front at different time

Fig.5 Effect of the mass fraction of photo-initiator on Vf and ti

Fig.6 Effect of the concentration of the thermal initiator on Vf and ti

Fig.7 Effect of pre-heated temperatures on initiated time

Fig.8 FTIR spectra of 221 resin and its cured roducts by PFP methoda. Epoxy oligomer; b. top-end product; c. low-end product.

Fig.9 FTIR spectra of epoxy resin by different uring methodsa. BF method; b. PFP method.

Fig.10 TG curves of epoxy resin cured by PFP methoda. Low-end product; b. top-end product.

Fig.11 TG curves of epoxy resin cured by BF method(a) and PFP method(b)

Fig.12 DSC curves of product cured by PFP method(a) and thermal curing process(b)

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紫外光引发环氧树脂的下行前线聚合行为

Curing of Epoxy Resin by UV-light Triggered Descending Frontal Polymerization^†

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紫外光引发环氧树脂的下行前线聚合行为

Curing of Epoxy Resin by UV-light Triggered Descending Frontal Polymerization†

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Curing of Epoxy Resin by UV-light Triggered Descending Frontal Polymerization^†