Abstract: Preparation of PS/PMMA composite materials by adding styrene butadiene rubber (SBR) was performed by in-situ two steps polymerization. The effect of the amount of SBR scattering substance on the optical properties of composite materials was investigated. The results indicated that the addition of SBR powder could have a synergistic effect with the MMA pre-polymer. The haze curve of the sample versus pre-polymeric MMA’s amount and SBR’s amount showed an oscillating variation relationship. The transmittance curves of the sample versus pre-polymeric MMA’s content was also an oscillating variation relationship，but the transmittance curve of the sample versus SBR’s content was not apparent oscillating variation relationship. The morphology of the composite materials was characterized with SEM. The surface of a notched sample showed that SBR particles were uniformly dispersed in the matrix.

摘要： 将丁苯橡胶添加到预聚MMA和St的混合溶液中经过原位聚合的方法制备PS/PMMA高聚物复合材料。研究了散射体物质添加量对样品的光学性能的影响。实验结果表明：SBR和预聚MMA对样品的光散射性能产生了协同作用；PS/PMMA高聚物复合材料的雾度值随SBR添加量的改变而产生明显的振荡，而样品的透光率随SBR添加量的改变则其振荡关系存在，但是不显著；PS/PMMA/SBR样品的雾度值及透光率随预聚MMA添加量的改变呈现弱的振荡变化关系。形貌分析表明：散射剂能够很好地分散于基体中。