溴化异丁烯-对甲基苯乙烯共聚物发泡材料的制备及性能

Preparation and performance of brominated isobutylene-methyl styrene copolymer foamed material

以氮气为物理发泡剂,采用间歇式发泡法对溴化异丁烯-对甲基苯乙烯共聚物(BIMSM)基体材料进行发泡,研究了高岭土用量及发泡温度对BIMSM发泡材料力学性能及泡孔结构的影响。结果表明,在相同发泡温度下,随着高岭土用量的增加,发泡材料的密度、邵尔C硬度、拉伸强度及撕裂强度均增大,泡孔尺寸呈先增大后减小的趋势,泡孔密度则先减小后增大,泡孔分布不均匀程度增加。当高岭土用量相同时,随着发泡温度的升高,发泡材料的密度、邵尔C硬度、拉伸强度及撕裂强度均降低,泡孔尺寸增大,泡孔分布更加均匀。

Brominated isobutylene-methyl styrene （BIMSM） foam was prepared by the batch-foaming method using nitrogen as physical blowing agent, and the effect of amount of kaolin and foaming temperature on the mechanical property and cell structure of BIMSM foam were investigated. The results showed that under the same foaming temperature, with the increase amount of kaolin, the density, Shore C hardness, tensile strength and tearing strength of BIMSM foam increased, the cell diameter increased firstly and then decreased, while the celldensity decreased firstly and then increased, and the degree of irregularity of cell distribution increased. Under the same amount of kaolin, with the increase of foaming temperature, the density, Shore C hard- ness, tensile strength and tear strength of foam de- creased, the cell diameter increased and the cell distribution became more uniform.