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
聯系方式
  • 通信地址:四川省成都市武侯區一環路南一段24號
  • 郵編:610065
  • 電話:02885401152
  • 傳真:
  • Email:liangjiang@scu.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Sustainable Thermosetting Polyurea Vitrimers Based on a CatalystFree Process with Reprocessability, Permanent Shape Reconfiguration and Self-Healing Performance
作者:Liang Jiang, Zhimeng Liu, Yuan Lei, Ye Yuan, Bo Wu, Jingxin Lei*
關鍵字:thermosetting polyureas, catalyst-free, reprocessability, shape reconfiguration, self-healing
論文來源:期刊
發表時間:2019年
Traditional thermosetting polyureas (TPUs) with eminently comprehensive performance have been used in a variety of industrial applications. However, they suffer from a certain intractable difficulty in achieving multiple functions such as reprocessability, shape reconfiguration, or self-healing performance due to the extremely stable covalent cross-linking. Herein, we employ hindered urea bonds (HUBs) as a reversible dynamic covalent cross-linkage to design catalyst-free hindered thermosetting polyureas (HTPUs). By incorporating HUBs into TPUs, the synthesized HTPUs can be reprocessed by using hot press or microinjection technique without any catalyst. In addition, those obtained materials have achieved great abilities of permanent shape reconfiguration and self-healing. Especially, the combination of the conventional elastic shape memory with the solid-state plastic shape reconfiguration in these HTPUs will broaden the geometrically complex shapes for shape memory polymer. Importantly, introducing longer and more bulky substituents into HTPUs can simultaneously endow the materials with excellent mechanical properties and the aforementioned multiple functions. Despite what is mentioned in this article, more potential HTPUs with excellent mechanical properties and multiple functions could be further designed by introducing longer and more bulky substituents into the formal polymers.
主站蜘蛛池模板: 崇左市| 光山县| 余姚市| 乐清市| 玉屏| 长岛县| 伊宁县| 静安区| 同江市| 柏乡县| 滕州市| 北安市| 建宁县| 江山市| 冕宁县| 新宾| 固镇县| 垫江县| 陵水| 鄂伦春自治旗| 江山市| 柯坪县| 博湖县| 红桥区| 河北区| 兴安县| 西青区| 阳春市| 凭祥市| 嵊州市| 蛟河市| 普定县| 富民县| 介休市| 夏河县| 梁河县| 垫江县| 手游| 黄大仙区| 兴海县| 哈尔滨市|