摘要
采用不同结构的异氰酸酯和多元醇制备了一系列聚氨酯弹性体,主要考察了异氰酸酯种类对聚氨酯弹性体力学性能的影响。研究表明,由1,5萘二异氰酸酯制得的弹性体拉伸强度和撕裂强度较高,分别为38.75MPa和109.77kN/m,而由对苯二异氰酸酯制得的弹性体具有最大的扯断伸长率(557.84%)。此外还研究了多元醇种类和扩链系数α对弹性体力学性能的影响,研究表明,选用聚ε己内酯二醇制得的弹性体具有较好的性能,且拉伸强度和撕裂强度均随扩链系数的增大先增大后减小,而扯断伸长率一直增大。
In this paper a series of polyurethane elastomers with different isocyanates and polyols were prepared, then mechanical property test and scanning electron microscope were applied to study the effect of i- socyanate type on mechanical properties of the elastomers. The results showed that the tensile strength and tear strength of the polyurethane,, elastomer prepared with 1,5-Naphthalene diisocyanate were best, and the values were respectively 38. 75 MPa and 109.77 KN/m, while the elastomer containing p-phenylene diisocya- nate owned the largest elongation at break （557. 84%）. Besides, the effects of polyol type and chain extender coefficient on mechanical properties of the elastomers were also discussed in this paper, the results showed that the elastomer prepared with ploycaprolactone had better mechanical properties, the tensile strength and tear strength increased first and then decreased with the increase of the chain extender coefficient, but the elongation at break increased all the time.
出处
《弹性体》
CAS
2012年第3期52-55,共4页
China Elastomerics
基金
山西省科技攻关项目(20090321074)
关键词
异氰酸酯
多元醇
扩链系数
聚氨酯弹性体
力学性能
isocyanate
polyol
chain extender coefficient
polyurethane elastomer
mechanical property
