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摘要： 以马来酸酐接枝的聚苯乙烯（PS）为增容剂，通过密炼机熔融混合，制备了不同改性配比的氨纶/PS共混物，研究了不同的聚氨酯添加量对聚苯乙烯物理、力学性能的影响。研究结果表明改性五（即：聚氨酯、增容剂、PS原料分别为5、20、75份）的综合性能较好，其断裂伸长率为3.52%，提高了0.88%，拉伸强度提高为51.74Mpa，提高了1.48 Mpa，弯曲强度为49.61Mpa，减小了6.22Mpa，冲击强度为3.51 KJ/m2，减少了0.22 KJ/m2。此外，改性五的熔融指数较PS原料（6.042g/10min）有所上升，为6.048g/10min。这说明改性五在成型时流动性较好。并且改性五的玻璃化转变温度相对于PS原料（139.2℃）有所增加，提高到145.3℃。而文卡热变形温度分析表明改性PS的热变形温度变化幅度较小，都在90℃上下波动。5569
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关键词： 聚氨酯；马来酸酐；接枝；聚苯乙烯（PS）
Study on toughening and recycling PS with polyurethane
Abstract：The polyurethane/PS blends with different ratios of polyurethane, bulking agent and PS was prepared by mixer using Maleic anhydride grafted polystyrene (PS) as a bulking agent. The physical and mechanical properties, morphologies of samples with different content of polyurethane were extensively investigated. The experimental results showed that the the modified five (i.e.: Polyurethane, compatibilizer, PS material are 5,20,75phr) have a better integrated performance. It’s fracture elongation is 3.52%, increased by 0.88%, tensile strength is 51.74Mpa, increased by 1.48MPa, while It’s bending strength is 49.61Mpa,decresed by 6.22Mpa, impact strength is 3.51 KJ/m2, decresed by 0.22 KJ/m2. In addition, the melt index of the modified five is 6.048g/10min higher than PS material (6.042g/10min). This shows that the modified five have a good fluidity during molding. And the glass transition temperature of the modified five increased to 145.3℃, which is higher than PS material (139.2℃). The analysis of the Vicat heat distortion experiment shows that the thermal deformation temperature of modified PS fluctuates around 90℃.
Keywords: Polyurethane; MAH; Grafting; Polystyrene;
目 录
摘要： i
Abstract： i
目 录 ii
1 绪论 1
1.1 聚苯乙烯增韧研究进展 1
1.1.1 刚性粒子增韧聚苯乙烯的研究 1
1.1.2 刚性聚合物微球透明增韧聚苯乙烯 2
1.1.3 不同烷氧基钬掺杂增韧聚苯乙烯 2
1.1.4 羧基丁苯-纳米氧化硅复合粉末增韧聚苯乙烯 2
1.1.5 基于选区激光烧结的无机纳米A12O3粒子增强增韧聚苯乙烯 2
1.2本课题研究内容，目的及意义 3
2 实验部分 4
2.1 增容剂的制备 4
2.1.1 增容剂的选择 4
2.1.2 实验原料 5
2.1.3 实验仪器及设备 5
2.1.4 实验步骤 5
2.2 再生氨纶/PS的制备 5
2.2.1 实验原料 5
2.2.2 实验仪器及设备 5
2.2.3 实验步骤 6
2.3 改性PS的注塑成型 6
2.4 工艺路线 6
3 结果与讨论 7
3.1 红外光谱测试 7