私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯(lián)系方式
  • 通信地址:江蘇省無錫市蠡湖大道1800號
  • 郵編:214122
  • 電話:13567439736
  • 傳真:
  • Email:songqi.ma@jiangnan.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Comparison of hydrogenated bisphenol A and bisphenol A epoxies: curing behavior, thermal and mechanical properties, shape memory properties
作者:Jingjing Wei, Songqi Ma,* Hong Yue, Sheng Wang, Jin Zhu*
關鍵字:epoxy resins, thermosets, non-planar cyclic structure, shape memory effects, structure-property relationships
論文來源:期刊
具體來源:Macromolecular Research
發(fā)表時間:2018年


Hydrogenated bisphenol A epoxy resin was cured using different kind of curing agents,

resulting in epoxy networks with better shape memory properties than bisphenol A epoxy networks. The non-isothermal curing kinetics investigated by differential scanning calorimetry (DSC) demonstrated that hydrogenated bisphenol A epoxy showed lower curing reactivity than bisphenol A epoxy, while it still could be cured well. The thermal and mechanical properties as well as shape memory properties were studied by dynamic mechanical analysis (DMA), DSC, thermogravimetric analysis (TGA), three-point bending test and U-type shape memory test and cyclic stretch test using DMA. Results manifested that hydrogenated bisphenol A epoxy systems exhibited lower shape transition temperature (lower Tg), slightly higher modulus, better toughness, much faster shape recovery rate, and better elongating ability at temperature above Tg than bisphenol A epoxy systems, which was due to the rigidity of cyclohexane ring from its steric hindrance and favorable segmental mobility when absorbing external energy such as heating or bending. Moreover, the shape fixity and shape recovery ratio of all the samples were as high as 96.3~98.5% and 100% and their cycling stability during shape memory test was excellent. Although lower than bisphenol A epoxy networks, hydrogenated bisphenol A epoxy networks possessed high thermal stability with initial degradation temperature (Td5%) of >305 oC.

主站蜘蛛池模板: 杭锦旗| 孝昌县| 蓝田县| 同心县| 乌苏市| 分宜县| 建宁县| 周口市| 新河县| 百色市| 东兰县| 武鸣县| 贵阳市| 永川市| 松阳县| 务川| 定边县| 桐梓县| 焦作市| 龙口市| 仙居县| 定兴县| 绥德县| 三穗县| 阳山县| 孝感市| 庆元县| 乌恰县| 城固县| 慈溪市| 青龙| 紫阳县| 泰顺县| 长武县| 桃江县| 龙泉市| 南华县| 博爱县| 贵南县| 陆河县| 如皋市|