聚丙烯酸丁酯交联剂量对聚丙烯酸丁酯-蓖麻油聚氨酯SEN形态和性能的影响

Effect of Crosslinking Agent Contents of Poly (n-butyl Acrylate) on the Morphology and Properties of SEN in Poly (n-butyl Acrylate)- Polyurethane Based on Castor Oil System

以聚丙烯酸丁酯交联剂量分别为0,0.25％和0.5％的三种PnBA-COPU的SEN为例,讨论了SEN中一个组分的交联程度对形态和性能的影响。

The presem paper covers morphology and properties of three series of poly (n-butyl acrylate)-polyurethanes based on castor oil (PnBA-COPU) and the effect of crosslinking density of PnBA on the morphology and properties. The tensile strength of PnBA rich-in SENs increases with increasing crosslinking density, whereas the elongation at break and swelling degree decrease. For other compositions, both tensile strength and elongation at break of 0. 25％ crosslinking agent content in SENs are lower than those of 0 and 0.50％ crosslinking agent contents. The compatibility of PnBA and COPU in the former is much better than in the latter two.