【摘要】 以聚己内酯、四氢呋喃－环氧丙烷共聚醚、甲苯二异氰酸酯、ＭＯＣＡ等为原料，制备了浇注型聚氨酯弹性体。研究了聚己内酯与共聚醚的比例、ＮＣＯ质量分数、增塑剂与ＭＯＣＡ用量比例对弹性体力学性能的影响。以最佳工艺条件制得的弹性体，其性能为：邵尔Ａ型硬度５７～５８，３００％模量３．８～３．９ＭＰａ，拉伸强度１８．５～１９．５ＭＰａ，扯断伸长率４５０％～４６０％，撕裂强度２８～３０ｋＮ／ｍ。更多还原

【Abstract】 Cast PU elastomers were prepared from polycaprolactone diol, tetrahydrofuran - propylene oxide copolyether, TDI, MOCA, etc. The effects of polycaprolactone - copolyether proportion, NCO contents, plasticizer versus MOCA ratio on mechanical properties of PU elastomers were studied. The mechanical properties of PU elastomers prepared with optimum process are Shore hardness 57 - 58, 300% modulus 3. 8 - 3. 9 MPa, tensile strength 18. 5 - 19. 2MPa, elongation at break 450 - 460%, tearing strength 28 - 30 kN/m.更多还原