PS/K树脂合金的制备及表征

Preparation and Characterization of the K-Resin/PS Alloy

利用熔融共混的方法,考察了K树脂的质量分数在10%～50%时对聚苯乙烯(PS)/K树脂合金材料光学和力学性能的影响,并且用扫描电镜分析了冲击样条断面的表面形貌.结果表明,在K树脂的质量分数从10%变化到50%过程中,PS/K树脂合金的雾度可由24.6%降低为11%,而透光率与纯PS相差无几,仅仅从86.5%变化为85.6%,说明PS与K树脂的光学匹配性较好.力学性能测试结果和扫描电镜分析均表明,随着K树脂在合金中所占的质量分数增加,合金材料的冲击韧性和拉伸时所产生的断裂伸长率均有所增大,冲击韧性从1.93 kJ/m2增大到4.65 kJ/m2,断裂伸长率从1.5%增大到14.5%,表现出明显的塑性变形形貌.

In this paper, the effect of mass fraction of K-Resin with the range from 10% to 50% on the optical and mechanical properties of polystyrene （PS）/K-Resin was studied by melting mixing method, and the sur- face morphology of the cross-section of impact samples were analyzed with SEM. The results show that with the increase of K-Resin＇ s mass fraction from 10% to 50% , the haze of PS/K-Resin alloy can he decreased to 11% from 24.6% while the transmittance is almost the same as pure PS, only change from 86.5% to 85. 6% , indicating that the optical match of PS and K-Resin is good. The results of mechanical properties and SEM analysis show that with the increase of K-Resin＇ s mass fraction in the alloy, the impact toughness of the alloy material and the elongation at break generated by tension both increase, the impact toughness can be in- creased to 4.65 kJ/m2 from 1.93 kJ/m2 and the elongation at break generated by tension can be increased to 14.5% from 1.5% , showing an obvious plastic deformation morphology.