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HTBN/PTMG双软段聚氨酯弹性体的制备及力学性能研究
引用本文:陶海涛,刘喜军,马铁宁.HTBN/PTMG双软段聚氨酯弹性体的制备及力学性能研究[J].聚氨酯工业,2010,25(6):13-16.
作者姓名:陶海涛  刘喜军  马铁宁
作者单位:[1]齐齐哈尔大学材料科学与工程学院,161006 [2]黑龙江省普通高等学校聚合物改性与大分子分离重点实验室,齐齐哈尔161006
摘    要:以甲苯二异氰酸酯(TDI)、端羟基聚丁二烯-丙烯腈共聚物(HTBN)、聚四氢呋喃醚二醇(PTMG)为主要原料,3,5-二甲硫基甲苯二胺(DMTDA)为扩连剂,采用浇铸法制备了聚氨酯弹性体。研究了聚氨酯预聚体中NCO含量、HTBN/PTMG质量比、PTMG相对分子质量和改变扩链剂用量以及热处理时间对聚氨酯弹性体力学性能的影响。结果表明,低相对分子质量PTMG和高热处理温度有利于提高聚氨酯弹性体的力学性能,当聚氨酯预聚体中HTBN/PTMG的质量比为50∶50、NCO质量分数为5.98%、NCO/NH2摩尔比为1.20、115℃下热处理2 h时,聚氨酯弹性体的力学性能最佳。

关 键 词:聚氨酯弹性体  HTBN  PTMG  力学性能

Preparation and Mechanical Properties of Polyurethane Elastomers with Two Soft Segments of HTPB/PTMG
Tao Haitao,Liu Xijun,Ma Tiening.Preparation and Mechanical Properties of Polyurethane Elastomers with Two Soft Segments of HTPB/PTMG[J].Polyurethane Industry,2010,25(6):13-16.
Authors:Tao Haitao  Liu Xijun  Ma Tiening
Affiliation:1.College of Materials Science and Engineering,Qiqihar University,161006,China)(2.Key Laboratory of Polymer Modification and Macromolecules Separation,College of Heilongjiang Province,Qiqihar 161006,China)
Abstract:A series of polyurethane elastomers were prepared by casting method using toluene diisocyanate(TDI),hydroxy-terminated butadiene-acrylonitrile copolymer(HTBN) and polytetrahydrofuran glycol(PTMG) as the main raw materials,and using 3,5-dimetylthio-2,4-diaminotoluene or 3,5-dimetylthio-2,6-diaminotoluene(DMTDA) as chain extender.The influences on the mechanical properties of polyurethane elastomers were studied,including the content of NCO in polyurethane prepolymer,the mass ratio of HTBN/PTMG,the molecular weight of PTMG,the dosage of chain extender and heat treatment time.The results showed that the lower molecular weight of PTMG and the higher temperature of heat treatment were both favorable for increasing the mechanical properties of polyurethane elastomers.When the mass ratio of HTBN/PTMG was 50∶50,the content of NCO was 5.98%,the molar ratio of NCO/NH2 was 1.20 and the heat treatment time was 2 h at 115℃,the mechanical properties of polyurethane elastomers were the best.
Keywords:polyurethane elastomer  HTBN  PTMG  mechanical property
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