阻燃型硬质聚氨酯泡沫的制备工艺探讨

Technology of flame retardant rigid polyurethane foam by using degradation product of PET

采用乙二醇降解废弃聚酯的产物对苯二甲酸乙二醇(BHET)、多异氰酸酯和去离子水等作为原料,并在发泡原料中加入阻燃剂制备出阻燃型硬质聚氨酯泡沫(RPUF)。探讨了包括反应物配比、催化剂、表面活性剂和反应温度等不同的反应条件对合成泡沫性能的影响,并确定最佳工艺条件;之后利用热重分析(TGA)对阻燃型RPUF的热稳定性能进行研究,利用动态热机械分析(DMA)对样品的玻璃化转变温度和阻尼性能进行测试。实验表明,利用废弃聚酯解聚产物制备阻燃型RPUF的最佳工艺条件为:反应物多异氰酸酯、BHET和去离子水的质量比为2.45∶1∶0.1,与催化剂辛酸亚锡和表面活性剂硅油的质量比为0.115∶0.08,反应温度80℃。

BHET which was the degradation product of the waste polyester （PET） ,polyisocyanate,deionized water and so on were prepared,and APP as flame retardants was added in the process of flame retardant rigid polyurethane foam （RPUF）. The ratio of the reactants,the catalyst content, the surfactant content and the reaction temperature were studied to get the optimized reaction conditions to prepare flame retardant RPUF. Also; the thermal stability was illustrated by using thermal gravity analysis （TGA）, and the dynamical mechanical analysis （DMA） tested the glass transition temperature and damping property of the sample. It was shown that the proper weight ratio of BHET, polyisocyanate and deionized should be 2.45 ： 1 ： 0.1. The weight ratio of the catalyst stannous octoate and the surfactant simethicone was 0. 115 ： 0. 08, the reaction temperature should be controlled 80℃.