软段结构对MDI型TPU力学性能和动态黏弹性能的影响  

Effect of Soft Segment Structure on Mechanical Properties and Dynamic Viscoelastic Properties of MDI Based TPU

作　　者：李宗景 易玉华[1,2] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640 [2]广州华工百川科技有限公司,广州510640

出　　处：《聚氨酯工业》2016年第4期6-8,共3页Polyurethane Industry

基　　金：国家自然科学基金资助项目(51278201)

摘　　要：分别以聚己二酸乙二醇酯二醇(PEA)、聚四氢呋喃醚二醇(PTMG)、聚己内酯二醇(PCL)及聚碳酸己二醇酯二醇(PCDL)作为软段,以二苯基甲烷二异氰酸酯(MDI)和扩链剂1,4-丁二醇(BDO)作为硬段,采用预聚体法制备了4种不同软段结构的热塑性聚氨酯弹性体(TPU)。研究了不同的软段结构对弹性体的力学性能和动态黏弹性能的影响。结果表明,PTMG由于分子间作用力小,由其制备的TPU力学性能较低,但动态黏弹性能较好,内生热低;PCDL由于极性大、结晶性强,由其制备的TPU力学性能好,但内生热较大。With the prepolymerization method, a series of thermoplastic polyurethane elastomer（TPU） were synthesized using polyethylene adipate diol （ PEA）, polytetramethylene glycol （ PTMG）, polycaprolactone diol （PCL） and poly-carbonate-hexane diol（PCDL） as the soft segments, 4,4＇-diphenylmethane diisocyanate（MDI） and 1 ,d-butanediol（BDO） as the hard segments. The effect of soft segment structure on mechanical properties and dynamic performance of TPUs was discussed. The results showed that the PTMG-TPU with small intermolecular force had a low me- chanical properties, better dynamic viscoelastic properties and low endogenous heat. Due to the higher polar and crystallinity, the TPU prepared by PCDL had a good mechanical property and larger endogenous heat.

关 键 词：低聚物多元醇 MDI 热塑性聚氨酯 软段 力学性能 动态黏弹性能 

分 类 号：TQ334.1[化学工程—橡胶工业]