【摘要】 以化学发泡剂CFA-8125、物理发泡剂顺-1,1,1,4,4,4-六氟-2-丁烯(Opteon 1100)及水作为混合发泡剂，制备了一系列密度基本相同的聚氨酯硬泡。考察了CFA-8125与Opteon 1100不同用量对发泡工艺参数、泡沫力学性能、闭孔率、导热系数和泡孔结构的影响。结果表明，CFA-8125部分替代Opteon 1100,可使泡沫的起发时间、拉丝时间和凝胶时间缩短；该配方体系下，采用4.4份CFA-8125、12份Opteon 1100和2份水混合发泡，泡沫样品尺寸稳定性与Opteon 1100泡沫相当，泡孔更细腻。更多还原

【Abstract】 A series of rigid polyurethane foam with almost the same density were prepared using mixed foaming agent with a chemical foaming agent CFA-8125, a physical foaming agent cis-1,1,1,4,4,4-hexafluoro-2-butene(Opteon 1100) and water. The effects of different dosage of CFA-8125 and Opteon 1100 on process parameters, mechanical properties, closed cell ratio, thermal conductivity and bubble structure were investigated. The results showed that the creaming time, drawing time and gelling time were shortened when Opteon 1100 partially replaced by CFA-8125. In this formulation system, 4.4 parts of CFA-8125, 12 parts of Opteon 1100 and 2 parts of water were used for mixed foaming. The dimensional stability of the foam sample was comparable to that of Opteon 1100 foam, and the cells were more delicate.更多还原