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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
环氧树脂
扩链脲
聚乙二醇
潜伏性固化剂
增韧剂
Epoxy resin, Chain extended urea, Polyethylene glycol, Latent curing agent, Toughening modifier
