摘要
利用正硅酸乙酯（TEOS）水解和长链烷基三甲氧基硅烷（WD-10）的硅烷偶联剂作用，以甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）和甲基丙烯酸十二氟庚酯（DFMA）为原料的核壳型含氟丙烯酸酯聚合物乳液进行原位复合改性。通过XRD、FTIR、SEM—EDX、TEM、RGD、DSC、NMR等测试技术分析和讨论了合成的聚合物乳液的乳胶粒子结构和形态，以及TEOS和WD-10含量对改性的聚合物乳液稳定性和对聚合物成膜性的影响。结果表明，TEOS水解产生了SiO2，核壳型结构粒子基本呈现圆形分布，粒径为40～50nm。TEOS的最佳质量分数为3．1％～3．8％，WD-10含量宜控制在TEOS质量分数为0．9％～0．95％之间。
A novel fluorinated acrylic polymer with core-shell structure, which was obtained by semi-continuous seed emulsion polymerization with butyl acrylate（BA） as the core and methyl methylacrylate（MMA） and methyl dodecafluorinacrylate（ DFMA, C11H8O2F12 ） as the shell in the presence of mixed emulsifier of sodium lauryl sulfate（SDS） and octyl-phenyl poly-oxyethylene （TX-10）, was modified by hydrolysis of tetraethyloxysilane（TEOS） and coupling of long-chain alkyl trimethoxysilane （WD-10）. Silicon dioxide produced by the hydrolysis of TEOS was detected by X-ray diffraction （XRD）. FTIR, scanning electron microscopy coupled with energy dispersive X-ray analysis （ SEM-EDX）, transmission electron microscopy （ TEM）, stretch tester （RGD）, differential scanning calorimetry （DSC）, and NMR were used for characterizing the morphology structure, particle size, and the effect of TEOS and WD-10 content on the coating properties. The modified fluorinated acrylic polymer displayed improved performance in hydrophobicity, mechanical and optical properties. The optimal content of TEOS was 3. 1% -3. 8% and that of WD-10 was between 0. 9% and 0. 95% of TEOS.
出处
《应用化学》
CAS
CSCD
北大核心
2007年第6期605-609,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(20474050)
关键词
含氟聚合物
乳液聚合
TEOS水解
偶联剂
改性
fluorinated polymer, core-shell structure, emulsion, TEOS, modification
