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- 2016
有机硅交联剂对硅树脂/聚苯乙烯多孔复合材料性能的影响
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Abstract:
以苯乙烯(St)为单体,含甲基丙烯酰氧基丙基的有机硅树脂(MTQ)为交联剂,采用高内相比乳液模板(HIPE)法制备了蜂窝状、低密度及高孔隙率的MTQ/聚苯乙烯(PS)多孔复合材料,研究了MTQ对聚合物多孔复合材料微观结构、压缩性能及热稳定性的影响。结果表明:MTQ/PS多孔复合材料的泡孔呈立体球形且泡孔壁上有丰富的互连孔,相互贯通性良好,泡孔直径为2~9μm,互连孔的孔径大小介于0.35~1.85μm;所得多孔材料孔隙率可控,总孔隙率最高可达92%;该多孔复合材料的压缩强度为0.28~0.74 MPa,压缩模量为4.86~13.54MPa。当MTQ与St的质量比为30:100时,可获得泡孔直径较小、互连孔道较窄、压缩性能和热稳定性较好的MTQ/PS多孔复合材料。 Using styrene (St) as monomer and organic silicone resin with methacryloxypropyl group (MTQ) as crosslinking-agent, the MTQ/polystyrene (PS) porous composites with honeycomb, low densities and high porosity were prepared by high internal phase ratio emulsions template (HIPE) method. The effects of MTQ on microstructure, compressive properties and thermal stability of polymer porous composites were investigated. Results indicate that the MTQ/PS porous composites have three-dimensional spherical cavities and rich interconnection pores in cavities wall, connectivity is good, and the diameters of pores range from 2-9 μm with the average interconnection pores diameters of 0.35-1.85 μm. The porosity of porous materials could be controlled, and total porosity could reach as high as 92%. Additionally, the compressive strength of porous composites is 0.28-0.74 MPa, and compressive modulus is 4.86-13.54 MPa. When the MTQ to St mass ratio is 30:100, MTQ/PS porous composites with smaller cavities diameter, narrow interconnection pores, good compression properties and thermal stability could be obtained. 国家自然科学基金(51203047)
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