摘要
以甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸和三乙二醇二甲基丙烯酸酯等作为单体,制备了一种水性丙烯酸树脂,并与无机硅酸盐进行杂化。由于丙烯酸树脂与无机杂化后的树脂中硅氧键结合力比未杂化的丙烯酸树脂的碳碳键强,杂化树脂理应具备更好的热稳定性,但实际表现相反。为探究Li2SiO3对杂化树脂有机高分子链段的作用机理,采用物理混合方式,配制了梯度质量分数Li2SiO3与水性丙烯酸树脂的复合样品,通过热重分析仪(TGA)和傅立叶变换红外光谱分析仪(FT-IR)对复合样品进行表征,证明了杂化后的丙烯酸树脂羰基邻位的活泼氢与Li2SiO3表面羟基之间形成了分子间氢键,导致树脂热性能下降。
A kind of waterborne acrylic resin was synthesized by methyl methacrylate,butyl acylate,acrylic acid and triethylene glycol dimethacrylate as monomers,which was then hybridized with inorganic silicate Li2SiO3.The hybrid resin prepared with acrylic resin and lithium silicate should have a better thermal stability because of the higher energy of Si—O bond than C—C bond in acrylic resin without hybridization.However,the real situation was on the contrary.To explore the action mechanism of Li2SiO3 to the polymer chain in hybrid resin,the hybrid samples with waterborne acrylic resin and Li2SiO3 at different mass fraction were prepared by physical blend.By analysis of TGA and FT-IR,it was found that the ortho active hydrogen to carbonyl group in acrylic resin which was hybridized would form hydrogen bonding with the surface hydroxyl groups in Li2SiO3,which caused the reduction of thermal stability.
作者
吕盟
伍乙清
谭志良
LüMeng;Wu Yiqing;Tan Zhiliang(Guangzhou Research&Design Institute of Chemical Industry Co.,Lad.,Guangzhou 510425,China)
出处
《涂料工业》
CAS
CSCD
北大核心
2020年第11期21-25,共5页
Paint & Coatings Industry
关键词
水性丙烯酸树脂
Li2SiO3
热分解温度
分子间氢键
waterborne acrylic resin
Li2SiO3
thermal decomposition temperature
intermolecular hydrogen bonding
