透明聚氨酯树脂材料的热性能和力学性能

THERMAL AND MECHANICAL PROPERTIES OF TRANSPARENT CASTING POLYURETHANE RESIN

以4,4′-二环己基甲烷二异氰酸酯(H12MDI)、聚醚多元醇、交联扩链剂、催化剂及助剂合成了一些透明聚氨酯树脂材料。用FT-IR对其结构进行了表征。DSC、TGA测试其玻璃转化温度为95℃～110℃,质量损失5%和10%的热分解温度为265℃、280℃～286℃。SEM对其断口形貌分析表明,其断裂为脆性断裂或韧性断裂。力学性能测试其拉伸强度49MPa～56MPa,断裂伸长率11%～16%,抗弯强度106MPa～116MPa,弹性弯曲模量2006MPa～3089MPa,冲击强度19kJ/m2～35kJ/m2,邵氏硬度80D。透光率91%～93%。实验结果表明,透明聚氨酯树脂材料具有卓越的光学性能,优良的力学性能和中等的热稳定性能。

A series of transparent casting polyurethane resins (TCPU) were synthesized from cycloaliphatic diisocyanate (H_(12)MDI), polyols, crosslinking agent, catalyst, and special aids (T). They were characterized by FT-IR. the thermal stabilities of the obtained TCPU were examined by DSC and TGA. The morphologies fractured surfaces of TCPU were revealed by SEM. The crystalline-amorphous characters of TCPU were studied by WAXD, The optical properties of TCPU were studied by a visible light absorbance measurement. The mechanical properties of TCPU were measured, the results show that it has excellent mechanical properties.