• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Curing behavior and properties of 4,4'-bismaleimidodiphenylmethane and o,o'-diallyl bisphenol a: Effect of peroxides and hybrid silsesquioxane addition.
【24h】

Curing behavior and properties of 4,4'-bismaleimidodiphenylmethane and o,o'-diallyl bisphenol a: Effect of peroxides and hybrid silsesquioxane addition.

机译：4,4'-双马来酰亚胺基二苯甲烷和o，o'-二烯丙基双酚a的固化行为和性质：过氧化物和杂硅倍半氧烷添加的影响。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of this work is to provide a better understanding on the use of common organic free radical initiator and hybrid silsesquioxane on curing behavior, corresponding cured structures and thermal mechanical properties of organic bismaleimide (BMI) network consisted by 4,4'-bismaleimidodiphenylmethane (BMPM) and O, O'-diallyl bisphenol A (DABPA). Three kinds of peroxide, Dicumyl Peroxide (DCP), 2,5-Dimethyl-2,5-di(tert-butylperoxyl) hexane (Trigonox ®101), 3,6,9-Triethyl-3,6,9,-trimethyl-1,4,7-triperoxonane (Trigonox ®301) and two types of silsesquioxane, Octastyrenyl (OSTS) and N-Phenylaminopropyl cage mixture (APS) were investigated with BMI system. Specifically, onset of cure reaction and evolution of exothermic heat flow by the differential scanning calorimetry were used to study changes in the reaction mechanism when different initiators and/or silsesquioxane was added. Thermal mechanical properties of cured network, glass transition temperature and degradation kinetics were investigated as a function of additive types and concentration. The result of this work showed that Trigonox® 101 was the most suitable initiator for BMPM/DABPA system due to its low onset curing temperature, around 130oC and mild initiation step which did not result in high homopolymerization rate of BMPM as compared to DCP. Glass transition temperature of BMPM/DABPA with 0.3wt% Trigonox® 101 was significantly improved, 90oC higher than the systems without addition of peroxide additive.;To improve thermal stability of BMI thermoset network, hybrid silsesquioxanes were added into the system. OSTS is a cage (SiO1.5)8 containing eight styrenyl functional groups surrounding the SiO core. The styrenyl functional groups of OSTS can react with BMPM through the free radicals formed by BMPM when heated to around 200oC. APS is a cage mixture of (SiO1.5)n, where n is equal to 8, 10 or 12, with N-aminopropyl groups surrounding the SiO core. APS will react with BMPM at around 150oC through Michael addition reaction. This work showed that this secondary amine in silsesquioxane could effectively react with BMPM forming useful networks. The enhancement in thermal properties, such as glass transition temperature of BMI network by APS was more significant than the OSTS addition. BMI network with only 5wt% APS addition showed an enhancement of 30oC in glass transition temperature while system with 10wt% OSTS showed 20oC increase. Thermo-oxidative degradation rate was also greatly reduced with the addition of hybrid silsesquioxanes.
机译：这项工作的目的是为了更好地理解常见的有机自由基引发剂和杂硅倍半氧烷在由4,4'-双马来酰亚胺二苯甲烷（ BMPM）和O，O'-二烯丙基双酚A（DABPA）。三种过氧化物，过氧化二枯基（DCP），2,5-二甲基-2,5-二叔丁基过氧正己烷（Trigonox®101），3,6,9-三乙基-3,6,9，-三甲基用BMI系统研究了-1,4,7-三氧杂环戊烷（Trigonox®301）和两种倍半硅氧烷，八碳烯基（OSTS）和N-苯基氨基丙基笼型混合物（APS）。具体地，使用差示扫描量热法进行固化反应的发生和放热流的演变来研究当添加不同的引发剂和/或倍半硅氧烷时反应机理的变化。研究了固化网络的热机械性能，玻璃化转变温度和降解动力学与添加剂类型和浓度的关系。这项工作的结果表明，Trigonox®101是最适合BMPM / DABPA体系的引发剂，因为它的起始固化温度低，在130°C左右且引发步骤温和，与DCP相比，不会导致BMPM的高均聚速率。含0.3wt％Trigonox®101的BMPM / DABPA的玻璃化转变温度显着提高，比不添加过氧化物添加剂的系统高90oC。;为提高BMI热固性网络的热稳定性，向系统中添加了杂硅倍半氧烷。 OSTS是一个笼罩（SiO1.5）8，包含围绕SiO核的八个苯乙烯基官能团。当加热到200oC时，OSTS的苯乙烯基官能团可通过BMPM形成的自由基与BMPM反应。 APS是（SiO1.5）n的笼状混合物，其中n等于8、10或12，N-氨基丙基环绕SiO核。通过迈克尔加成反应，APS将在约150oC下与BMPM反应。这项工作表明倍半硅氧烷中的仲胺可以与BMPM有效反应，形成有用的网络。 APS对BMI网络的玻璃化转变温度等热性能的增强比对OSTS的增强更为显着。仅添加5wt％APS的BMI网络显示出玻璃化转变温度提高了30oC，而OSTS 10wt％的系统显示出增加了20oC。杂硅倍半氧烷的加入也大大降低了热氧化降解速率。

著录项

  • 作者

    Zhu, Jiang.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Chemistry Polymer.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 190 p.
  • 总页数 190
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号