金尾矿用量对聚氨酯性能的影响

Effects of gold tailings dosage on properties of polyurethane

以异佛尔酮二异氰酸酯、聚己内酯二醇、二羟甲基丁酸和季戊四醇三丙烯酸酯等为主要原料,掺杂表面处理后的金尾矿,利用原位聚合法制备聚氨酯乳液及薄膜材料,探讨了金尾矿质量对聚氨酯乳液稳定性及薄膜透光率、结晶性、耐水性、拉伸性能、热稳定性等性能的影响。结果表明,随着金尾矿质量的增加,聚氨酯乳液的稳定性下降,聚氨酯薄膜的结晶性增强,耐水性提高,透光率降低,热稳定性增加,拉伸强度先增大后减小,断裂伸长率始终呈现下降趋势。过量的金尾矿会影响到体系的相容性,使得吸水率减小幅度和透光率下降幅度均较小,甚至会使热稳定性有所下降。

Polyurethane emulsion and film materials are prepared by in situ polymerization method using isophorone diisocyanate,polycaprolactone glycol,dimethylol butyric acid and pentaerythritol triacrylate as main raw materials and doping with gold tailings after surface treatment. The effects of gold tailings dosage on the stability of polyurethane emulsion,and the light transmittance,crystallization,water resistance,tensile property and thermal stability of the film prepared are discussed. The results show that with the increasing dosage of gold tailings,the stability of polyurethane emulsion decreases,and the crystallization,water resistance,light transmittance,and thermal stability of polyurethane film enhances,increases,decreases and increases respectively. The tensile strength of polyurethane film increases at first and then decreases,while its elongation at break decreases always.However,the excessive gold tailings dosage can affect the compatibility of the system,which causes both water absorption rate and light transmittance to decrease slightly and even make the thermal stability decrease.