应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2014年
11期
1985-1988
,共4页
硅丙乳液%半间歇法%核壳型乳液合成法%核壳型乳液
硅丙乳液%半間歇法%覈殼型乳液閤成法%覈殼型乳液
규병유액%반간헐법%핵각형유액합성법%핵각형유액
acrylic emulsion%semi-batch method%core-shell emulsion method%the nuclear/shell emul-sion
采用欠量加料核壳型乳液合成法,以十二烷基磺酸钠和烷基酚聚氧乙烯基醚乳化剂为复合乳化剂,以丙烯酸甲酯和丙烯酸丁酯为核单体,以乙烯基三乙氧基硅烷和丙烯酸丁酯为壳单体,KPS为引发剂,制备出核预聚体和壳预聚体,又以乳化剂、水、pH缓冲剂、核预聚体制备出核种子乳液,然后通过半间歇法加入壳预聚体和壳引发剂制得核/壳型硅丙乳液。对乳液进行了红外光谱测定,并初步探讨了乳化剂的用量、乳液pH值、乳化温度、引发剂的用量等因素对合成过程中乳液稳定性的影响。结果表明,当乳化剂的用量为单体总量的5%,引发剂用量为单体的0.7%,乳化温度为75~80℃,pH在接近中性的6.5~8.0时,制得硅丙乳液稳定性最好。
採用欠量加料覈殼型乳液閤成法,以十二烷基磺痠鈉和烷基酚聚氧乙烯基醚乳化劑為複閤乳化劑,以丙烯痠甲酯和丙烯痠丁酯為覈單體,以乙烯基三乙氧基硅烷和丙烯痠丁酯為殼單體,KPS為引髮劑,製備齣覈預聚體和殼預聚體,又以乳化劑、水、pH緩遲劑、覈預聚體製備齣覈種子乳液,然後通過半間歇法加入殼預聚體和殼引髮劑製得覈/殼型硅丙乳液。對乳液進行瞭紅外光譜測定,併初步探討瞭乳化劑的用量、乳液pH值、乳化溫度、引髮劑的用量等因素對閤成過程中乳液穩定性的影響。結果錶明,噹乳化劑的用量為單體總量的5%,引髮劑用量為單體的0.7%,乳化溫度為75~80℃,pH在接近中性的6.5~8.0時,製得硅丙乳液穩定性最好。
채용흠량가료핵각형유액합성법,이십이완기광산납화완기분취양을희기미유화제위복합유화제,이병희산갑지화병희산정지위핵단체,이을희기삼을양기규완화병희산정지위각단체,KPS위인발제,제비출핵예취체화각예취체,우이유화제、수、pH완충제、핵예취체제비출핵충자유액,연후통과반간헐법가입각예취체화각인발제제득핵/각형규병유액。대유액진행료홍외광보측정,병초보탐토료유화제적용량、유액pH치、유화온도、인발제적용량등인소대합성과정중유액은정성적영향。결과표명,당유화제적용량위단체총량적5%,인발제용량위단체적0.7%,유화온도위75~80℃,pH재접근중성적6.5~8.0시,제득규병유액은정성최호。
Based on the new semi-batch core-shell method,the acrylic emulsion with nuclear/shell struc-ture was prepared through the emulsifier,water,core monomer,shell monomer and pH buttering agents. IR spectra of the emulsion were measured and the effect the emulsifier,pH,the temperature and initiator on stability of it was to explore. The results showed that the best stability of it were obtained on conditional of the 0. 7% initiator,the 5% emulsifier,temperature of 75~80 ℃,pH of 6. 5~8. 0,the stability of acrylic emulsion was best.