摘要
以氯铂酸为催化剂,通过五甲基二硅氧烷与端羟基聚丁二烯的硅氢加成反应,首次合成出以聚丁二烯为主链、侧链含硅氧烷的改性端羟基聚丁二烯。研究了硅氧烷改性的端羟基聚丁二烯作为聚氨酯软段对泡沫疏水性及吸油性能的影响。结果表明,硅氧烷接枝聚丁二烯作为聚氨酯软段可以有效地降低聚氨酯弹性体的表面能从而提高其疏水性,聚氨酯弹性体与水的接触角从未改性的84.6°提高到108°,硅氧烷接枝聚丁二烯制备的聚氨酯泡沫的与水的接触达到了158°;由于硅氧烷接枝聚丁二烯与甲苯、汽油和柴油的相容性较好,泡沫在吸附甲苯、汽油和柴油的过程中伴随着孔的填充的同时致使基体溶胀,从而可以有效地提高泡沫的吸附倍率。
In this work the hydroxyl groups at the end of a hydroxyl-terminated polybutadiene （ HTPB ） were at first protected using pentamethyldisiloxane, and then this end group-protected PB Was grafted by siloxanes via a hydrosilylation to obtain siloxane-grafted PB （SG-PB）. After deprecation the hydroxyl group was regained at the end of the SG-PB. Finally, the HT-SG-PB was used as soft and hydrophobie segments to prepare polyurethane （PU） elastomers as well as the foams. The effects of the HT-SG-PB segment on the oil absorption capacity and the hydrophobic behavior of the PU foam samples were studied. It is found that the water contact angle of the sample PU-2 with the HT-SG-PB segment is 108°, while that of the sample PU-1 without the HT-SG-PB segment is 84. 6°, the difference value of 23.4° indicates that the HT-SG-PB segment enhances the hydrophobicity of the PU elastomer. Consequently, the hydrophobic foam can be swollen remarkably during the oil absorbing. This is because the hydrophobic HT-SG-PB segment allows and promotes oil permeating into the elastomeric skeleton of the foam. more efficiency PU foam in oil recovery.
出处
《塑料工业》
CSCD
北大核心
2017年第9期128-134,共7页
China Plastics Industry
基金
国家自然科学基金(14zg2108)
西南科技大学博士基金(14zx7161)
四川省教育厅重点项目(16ZAO137)
关键词
泡沫
单端含氢硅氧烷
端羟基聚丁二烯
硅氢加成
疏水性
吸油
Foam
Siloxane
Hydroxyl-terminated Polybutadiene
Hydrosilylation
Hydrophobicity
Oil Absorption
