复合发泡体系对PUR–T发泡材料性能的影响  

Effcets of Composite Foaming System on Properties of PUR–T Foaming Materials

作　　者：汪扬涛 张青海[1,2] 曾安蓉 李云龙[1,2] Wang Yangtao;Zhang Qinghai;Zeng Anrong;Li Yunlong(College of Materials and Chemical Engineering, Liming Vocational University, Quanzhou 362000, China;Center of Fujian Provenical Hight Education for Practical Chemical Material, Quanzhou 362000, China)

机构地区：[1]黎明职业大学材料与化学工程学院,福建泉州362000 [2]实用化工材料福建省高校应用技术工程中心,福建泉州362000

出　　处：《工程塑料应用》2017年第10期113-118,共6页Engineering Plastics Application

基　　金：福建省中青年教师教育科研项目(JAT160841)

摘　　要：采用化学发泡法,用热塑性聚氨酯(PUR–T)及偶氮二甲酰胺(AC)/Na HCO3,AC/尿素及4,4’–氧代双苯磺酰肼(OBSH)/Na HCO3,OBSH/尿素复合发泡剂和交联剂甲苯二异氰酸酯(TDI)制备出交联型PUR–T发泡材料,通过万能电子试验机、发泡倍数和扫描电子显微镜分析比较了不同复合发泡剂的发泡效果,探讨了AC/Na HCO3用量配比和TDI用量对PUR–T发泡材料力学性能、发泡倍数和泡孔结构的影响。结果表明,AC/Na HCO3复合发泡剂对PUR–T的发泡效果最佳,泡孔均匀细密且结构最为稳定;当AC和Na HCO3用量均为0.2份、TDI用量为1.2份时,发泡剂的发泡速率和PUR–T的交联速率最匹配,发泡倍数为1.421倍,发泡效果最佳,制得的PUR–T发泡材料的力学性能最好,其拉伸强度达11.23 MPa,断裂伸长率达311%。Thermoplastic polyurethane(PUR-T)foaming materials were prepared with PUR-T,the composite foaming agents of azodicarbonamide(AC)/NaHCO3,AC/urea,4,4’-oxybis(benzenesulfonyl hydrazide)(OBSH)/NaHCO3,OBSH/urea and the cross linker of toluene diisocyanate(TDI).The foaming effects of different composite foaming agents were compared by universal electronic testing machine,foaming multiples and scanning electron microscopy.The effects of AC/NaHCO3dosage ratio and TDI dosage on mechanical properties,foaming multiples and pore structure of PUR-T foaming material were investigated.The results show that AC/NaHCO3composite foaming agent has the best foaming effect on PUR-T.The pores are uniform and fine,and the structure is the most stable.When the dosages of AC and NaHCO3are0.2phr and the dosage of TDI is1.2phr,the foaming rate of the foaming agent is best matched with the crosslinking rate of PUR-T,the foaming multiple is1.421times,the best foaming effect and the mechanical properties of PUR-T foam material are the best,the tensile strength is11.23MPa and the elongation at break is311%.

关 键 词：热塑性聚氨酯 复合发泡剂 发泡材料 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]