SEBS对iPP/NX8000K组合物透明性能和力学性能的影响

Effect of SEBS on transparency and mechanical properties of iPP/NX8000K complexes

摘要:

为了增强等规聚丙烯（iPP）的透明性能和冲击性能，采用物理共混方法，将弹性体氢化聚苯乙烯—丁二烯—聚苯乙烯嵌段共聚物（SEBS）与NX8000K成核剂配合使用对iPP进行改性。通过差示扫描量热分析（DSC）和X射线衍射分析（XRD）、偏光显微镜分析（POM）等方法研究了SEBS对iPP/NX8000K组合物的结晶行为、透明性能和力学性能的影响。结果表明：在NX8000K含量为0.6 %（质量分数，下同），SEBS用量为40 %时，iPP/NX8000K/SEBS三元组合物的雾度降至24.9 %，比纯iPP降低了54.7 %；冲击强度增至50.7 kJ/m2，与纯iPP相比提高了10倍。

Abstract:

In order to enhance the transparency and impact properties of iPP, the physical blending method was used to modify the iPP with the combination of elastomer SEBS and NX8000K nucleating agent. Differential scanning calorimetry (DSC), X-ray diffraction analysis (XRD), and polarization microscope analysis (POM) were used to study the effects of SEBS on the crystallization behavior, transparency, and mechanical properties of iPP/NX8000K complexes. The results showed that when the NX8000K content is 0.6 %( mass fraction, same as below) and the amount of SEBS is 40 %, the haze of the iPP/NX8000K/SEBS ternary composition reduced to 24.9%, which is 54.7% lower than that of pure iPP; the impact strength is increased to 50.7 kJ/m2, which is 10 times higher than that of pure iPP.