CAJ | 학술논문

采用半连续种子乳液聚合技术制备阳离子含氟核壳无皂乳液，对影响乳液聚合反应稳定性的主要因素进行探讨和优化；通过红外光谱(FT-IR)、核磁共振氢谱(1H-NMR)、透射电镜(TEM)、X 射线光电子能谱(XPS)、接触角测量仪表征共聚物化学组成、乳胶粒形貌、共聚物膜表面化学元素及其疏水性。结果表明，顺丁烯二酸-乙酯撑基[三甲基氯化铵]-十八烷基聚氧乙烯(20)醚酯(R303)用量为总单体质量3%，引发剂偶氮二异丁基脒盐酸盐(VA-50)用量为总单体质量0.7%，氟单体为总单体质量16.5%，反应温度T为70℃时，可以制得稳定的阳离子含氟核壳无皂乳液。FT-IR及1H-NMR测试结果证明氟单体完全参与共聚，TEM和XPS表征结果表明乳胶粒具有核壳结构，且氟元素在乳液成膜过程中容易迁移到涂膜表面并富集。与传统乳液聚合所得乳液相比，涂膜疏水性有一定提高。
채용반련속충자유액취합기술제비양리자함불핵각무조유액，대영향유액취합반응은정성적주요인소진행탐토화우화；통과홍외광보(FT-IR)、핵자공진경보(1H-NMR)、투사전경(TEM)、X 사선광전자능보(XPS)、접촉각측량의표정공취물화학조성、유효립형모、공취물막표면화학원소급기소수성。결과표명，순정희이산-을지탱기[삼갑기록화안]-십팔완기취양을희(20)미지(R303)용량위총단체질량3%，인발제우담이이정기미염산염(VA-50)용량위총단체질량0.7%，불단체위총단체질량16.5%，반응온도T위70℃시，가이제득은정적양리자함불핵각무조유액。FT-IR급1H-NMR측시결과증명불단체완전삼여공취，TEM화XPS표정결과표명유효립구유핵각결구，차불원소재유액성막과정중용역천이도도막표면병부집。여전통유액취합소득유액상비，도막소수성유일정제고。
Cationic fluorine-containing soap-free latex with core-shell structure was synthesized by semicontinuous seeded emulsion polymerization. Effects of dosage of the maleic acid double ester-octadecyl poly(ethyleneoxy)20 ether-ethylene trimethyl ammonium chloride (R303), the initiator (VA-50) and the fluorine monomer as well as reaction temperature on stability of emulsion polymerization were discussed and optimized. The chemical components of copolymer, micro-morphology of latex particles, surface chemical composition and hydrophobicity of latex film were characterized by FT-IR, 1H-NMR, TEM, XPS, respectively. Results showed that the stable cationic emulsion could be obtained when the dosage of R303, VA-50 and fluorine monomer and the reaction temperature were adopted as 3%, 0.7% and 16.5% (on basis of the mass of total monomers) as well as 70℃. FT-IR and 1H-NMR spectra confirmed the fluorine monomer could be incorporated into the latex particles through emulsion polymerization. TEM observation identified the formation of the core-shell structure particles. XPS study further indicated that the fluorine groups had the tendency to migrate to the film-air surface. Hydrophobicity of the soap-free latex film showed some improvement compared to the general one.