【摘要】 在室温用氧化还原引发剂将蓖麻油、甲苯二异氰酸酯及取代乙烯合成了蓖麻油聚氨酯/聚取代乙烯互穿网络聚合物(IPN),研究了不同组成对带锈铁板搭接剪切强度的影响。指出搭接剪切强度随取代乙烯均聚物的玻璃化温度增加而增加。NCO/OH之比愈大,搭接剪切强度也愈大。以蓖麻油聚氨酯/(丙烯腈-苯乙烯)共聚物的反应液作为带锈铁板的涂料,其涂膜性能良好。用扫描电镜观察了此种涂料与带锈铁板的结合状态,并讨论其成因。更多还原

【Abstract】 Interpenetrating polymer networks(IPN) were formed by simultaneous polymerization of castor oil, toluene diisocyanate and vinyl monomers using redox initiator and dibutyl tin dilaurate as catalyst at room temperature. The effect of composition of the IPNs on lap shear strength of the IPN between iron plates without rust removal has been studied. The results showed that the lap shear strength increases with increasing glass transition temperature of the polymer prepared. The higher the molar ratio of NCO/OH, the higher the lap shear strength. The coating formed by the castor oil polyurethane/poly(styrene-acryloni-trile) IPN on the iron plate without rust removal showed very good properties with respect to adherence, impact strength, flexibility and resistance to oil, dilute acid, alkali and brine.The surface of the rusted iron plate and the coated film were examined by SEM.更多还原