含柔性间隔基的扩链脲潜伏性固化、增韧环氧树脂性能研究  

Use of Chain Extended Ureas as Latent Curing Agents and Toughening Modifiers for Epoxy Resin

作　　者：张保龙[1] 张会旗[1] 由英才[1] 杜宗杰[1] 丁培元[1] 翟华春 黄吉甫[1] 

机构地区：[1]南开大学化学系吸附分离功能高分子材料国家重点实验室

出　　处：《高等学校化学学报》1998年第11期1837-1839,共3页Chemical Journal of Chinese Universities

基　　金：天津市自然科学基金

摘　　要：合成了含聚乙二醇柔性间隔基的扩链脲（Ｕｉ），并对其与环氧树脂／二苄胺混合体系的反应活性、贮存性能、动态力学性能及抗冲击性能进行了研究．结果表明：环氧树脂／扩链脲／二苄胺混合体系在３２３Ｋ下贮存期可达４０ｈ，其固化物抗冲击强度最高可达５５．８ｋＪ／ｍ２，较环氧树脂／小分子取代脲（Ｕ０）／二苄胺混合体系提高近５倍．A series of chain extended ureas(U i ) containing polyethylene glycol (PEG) flexible spacers were synthesized and the reactive activity, the storage property, dynamic mechanical behavior and impact strength of the epoxy resin/U i / dibenzyl amine(DBA) system were studied. The results showed that the storage life of the epoxy resin/U i /DBA system could be delayed to 40 h at 323 K and the impact strength of the epoxy resin/chain extended urea containing PEG spacer with molecular weight 600/DBA system was about five times higher than that of the epoxy resin/urea without PEG spacer(U 0)/DBA system.

关 键 词：环氧树脂 扩链脲 聚乙二醇 潜伏性固化剂 增韧剂 

分 类 号：O633.13[理学—高分子化学] TQ323.5[理学—化学]