有机硅改性聚氨酯的制备及其对有机-无机层合玻璃性能的影响

以聚丙二醇和异佛尔酮二异氰酸酯为合成单体,γ-氨丙基三乙氧基硅烷(KH-550)为有机硅源,采用预聚体法合成有机硅改性聚氨酯,并以其为中间粘接层,制备有机-无机层合玻璃。研究不同有机硅含量对改性聚氨酯光学性能、机械性能以及有机-无机层合玻璃界面粘接性能的影响。结果表明:在相同聚合条件下,随着KH-550含量增加,聚氨酯聚合程度降低,导致透明度降低、雾度增大,表面硬度降低;改性聚氨酯初始储能模量先增大后减小,硬段的玻璃化转变温度先增大后减小,均在KH-550添加量为1%时达到最大值。以聚氨酯胶层作为层合玻璃中间层,未改性的层合玻璃界面剪切强度为6.7 MPa,含有0.5%KH-550的层合玻璃界面剪切强度达到7.7 MPa。

Preparation of organosilicone modified polyurethane and its effect on the physical properties of organic-inorganic glass laminates

In this paper,organosilicone-modified polyurethane was synthesized by the prepolymerization method by using polypropylene glycol and isophorone diisocyanate as the synthetic monomers,andγ-aminopropyltriethoxysilane(KH550)as the silicone source.The modified polyurethane was used as the interlayer to prepare the organic-inorganic glass laminates.The effects of silicone contents on the optical properties,thermomechanical properties,and interfacial adhesion property of the glass laminates were investigated.With the KH550 content increasing,the polymerization degree of polyurethane is decreased,resulting in lower transparency,higher haze and lower surface hardness.The storage modulus of the modified polyurethane is increased at first and then decreased,and the glass transition temperature of hard segments is firstly increased and then decreased.Both reached the maximum value when the additive amount of KH550 is 1%.Using polyurethane adhesive layer as the interlayer of glass laminates,the interfacial shear strength of the unmodified glass laminates is 6.7 MPa,while the interfacial shear strength of glass laminates containing 0.5%KH550 is 7.7 MPa.