有机硅/聚氨酯改性树脂的研制

The Preparation of Polysilicone/Polyurethane Resin Modified

以丙三醇和蓖麻油聚氨酯（ＰＵ）改性有机硅树脂，研究了ＰＵ的结构等因素对改性体系热性能及抗冲击强度的影响，结果表明，ＰＵ的含量对改性体系的热分解行为及抗冲击性有明显影响；丙三醇ＰＵ和蓖麻油ＰＵ分别改性的有机硅树脂在性能上有明显差异，前者的抗冲击性优于后者，但热性能较差。

Polysilicone was modified with ricinolein and glycerin polyurthane(PU),and the effects of component and content of PU on heat stability and impact behavior of modified systems were investigated.It is shown that the heat stability and impact strength of PU polysilicone systems clearly depend on the content of PU.The properties of polysilicone modified with glycerin PU is differect from those with ricinolein PU and the impact strength of the former is superior to that of the latter.