【摘要】 <正> 一、前言溴端基液体聚丁二烯橡胶（以下简称DBBD）是遥爪型液体橡胶的重要品种之一。这种低分子量聚丁二烯,链端含有活性较大的烯丙基溴基团,链中部有二溴甲基,其结构式大致为[1]:Br-（-CH₂-CH-CHCH₂-）-C-（-CH₂-CH-CH-CH₂-）-B_rDBBD 由乳液聚合法合成,是1,4结构和1,2结构的无规共聚物,1,4结构中顺式含量约占30%[2]。更多还原

【Abstract】 The formulations and curing conditions of dibromopolybutad- iene(DBBD),which is a liquid rubber with functional terminal allyl bromide groups,as well as properties of vulcanizates were studied.The results indicate that the liquid DBBD is capable of chain extention and crosslinking at room temperature to form effective and regular elastic network by using a large variety of aliphatic polyamine curatives. At elevated temperatures azirid- inyl curing agents is also effec- tive,DBBD can be reinforced with carbon black to give high tensile, elastic vulcanizates.Kinetics of crosslinking reaction was inve- stigated by means of infrared spectra.DBBD has good bonding property to different materials and can be used as non-solvent adhesives and sealants.更多还原