基于蓖麻油的多异氰酸酯固化剂的合成与性能研究  

Synthesis and Properties of Polyisocyanate Curing Agent Based on Castor Oil

作　　者：朱彦 张初银 邱建帆 韩飞龙 岑小春 曾繁超 王江海 ZHU Yan;ZHANG Chuyin;QIU Jianfan;HAN Feilong;CEN Xiaochun;ZENG Fanchao;WANG Jianghai(Zhejiang Huafon Synthetic Resin Co.Ltd,Wenzhou 325200,China;Zhejiang Huafon New Materials Co.Ltd,Wenzhou 325200,China)

机构地区：[1]浙江华峰合成树脂有限公司,浙江温州325200 [2]浙江华峰新材料有限公司,浙江温州325200

出　　处：《聚氨酯工业》2025年第2期15-20,共6页Polyurethane Industry

摘　　要：以蓖麻油、甲苯二异氰酸酯(TDI)为主要原料进行加成反应合成了一种多异氰酸酯固化剂,并以此制得交联型聚氨酯膜(COPU)和聚氨酯(PU)革样品,讨论了蓖麻油的引入对样品各项性能的影响.红外光谱(FT-IR)表明COPU中无游离NCO基团,已完全固化;溶胀测试证明了COPU的交联网络结构;通过热重分析(TGA)、差示扫描量热分析(DSC)和拉伸测试表征了COPU的性能.结果表明,引入蓖麻油可增加聚氨酯TGA测试的残炭率,并使T5%从271.9℃提高至279.9℃,小幅提高热稳定性;样品的100%定伸模量从0.886 MPa降低至0.624 MPa,带来更柔软的手感.PU革样品的剥离力测试、耐折测试和耐湿热水解测试结果表明,蓖麻油的引入提升了PU革贴合的粘性和剥离力,将低温(-15℃)耐折性能从1万次提升至4万次,并改善了其耐湿热水解性能.A polyisocyanate curing agent was synthesized via the addition reaction of castor oil and toluene diisocyanate(TDI).Subsequently,cross-linked polyurethane films(COPU)and leathers were produced from this curing agent.The impact of introducing castor oil on properties was disscussed.Fourier-transform infrared spectroscopy(FT-IR)analysis confirmed that there were no free-NCO and COPU were fully cured,meanwhile swelling tests demonstrated the existence of a cross-linked network structure in COPU.The performance of the COPU was characterized by thermo gravimetric analysis(TGA),differential scanning calorimetry(DSC)and tensile test.The results indicated that the incorporation of castor oil increased the residual carbon rate,raised T5%from 271.9℃to 279.9℃to get better thermal stability,and reduced modulus of 100%elongation from 0.886 MPa to 0.624 MPa with softer tactile feeling.Peel strength test,flexing resistance test at low temperatures(-15℃)and hydrolysis resistance test in humid and thermal environment for PU leathers revealed that castor oil enhanced adhesion properties to get higher peel strength.The low-temperature flexing resistance was increased from 10000 cycles to 40000 cycles and hydrolysis resistance was improved.

关 键 词：蓖麻油 固化剂 交联型聚氨酯 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]