Three different synthesis strategies based on the in situ pre-polymerization process were employed in order to obtain High Impact Polystyrene (HIPS) with different type (morphology and size) of particles as the dispersed phase, achieved by the use of two styrene-butadiene rubbers (SBR) in the initial recipes. The rubbers used were tapered polystyrene/polybutadiene copolymers with a polystyrene/polybutadiene composition of 10/90 and 40/60 wt%. Results were discussed in terms of physical–chemical, morphological, mechanical and optical parameters. A combination of two or three types of particle morphologies, i.e. salami, core–shell and droplets in the same sample were evidenced by Transmission Electron Microscopy analysis, independently of the strategy employed. The grafting degree, volume fraction of the dispersed phase and impact strength were positively affected by the increase of the amount of 10/90 SBR in the recipe. Several HIPS samples showed a good balance between impact strength and gloss, particularly those obtained from the strategy herein named as melt blending.

中文翻译：

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以不同类型的颗粒为分散相制备高抗冲聚苯乙烯的合成策略，以平衡冲击强度和光泽

为了获得具有不同类型（形态和尺寸）颗粒作为分散相的高抗冲聚苯乙烯 (HIPS)，采用基于原位预聚合工艺的三种不同合成策略，通过使用两种丁苯橡胶实现(SBR) 在初始配方中。所用橡胶是锥形聚苯乙烯/聚丁二烯共聚物，聚苯乙烯/聚丁二烯组合物为10/90和40/60重量％。结果在物理化学、形态学、机械和光学参数方面进行了讨论。透射电子显微镜分析证明了两种或三种颗粒形态的组合，即同一样品中的意大利腊肠、核壳和液滴，与所采用的策略无关。嫁接度，分散相的体积分数和冲击强度受到配方中 10/90 SBR 用量增加的积极影响。几个 HIPS 样品在冲击强度和光泽度之间表现出良好的平衡，特别是那些从此处称为熔体共混的策略中获得的样品。