CAJ | 학술논문

采用定量化水溶性自由基捕捉剂三氯化铁，研究了油溶性引发剂引发细乳液聚合时，自由基从乳胶粒子脱吸的过程。结果表明，脱吸进入水相的自由基是引发聚合的主要自由基来源，水相溶解的引发剂对聚合的贡献较小。被水溶性自由基捕捉剂捕捉的水相自由基占引发剂分解出自由基总量的分率（捕捉分率）远大于水相引发剂产生自由基占引发剂分解出自由基总量的分率。捕捉分率随引发剂用量增加和乳胶粒子尺寸变大而降低，随水溶性自由基捕捉剂用量提高而增大，温度对捕捉分率没有影响。聚合速率和乳胶粒中平均自由基数目随捕捉分率提高而降低。
채용정양화수용성자유기포착제삼록화철，연구료유용성인발제인발세유액취합시，자유기종유효입자탈흡적과정。결과표명，탈흡진입수상적자유기시인발취합적주요자유기래원，수상용해적인발제대취합적공헌교소。피수용성자유기포착제포착적수상자유기점인발제분해출자유기총량적분솔（포착분솔）원대우수상인발제산생자유기점인발제분해출자유기총량적분솔。포착분솔수인발제용량증가화유효입자척촌변대이강저，수수용성자유기포착제용량제고이증대，온도대포착분솔몰유영향。취합속솔화유효립중평균자유기수목수포착분솔제고이강저。
Aqueous-phase radical trapper, ferric chloride, was employed to quantify the primary radical desorbed from the latex particle in miniemulsion polymerization initiated by oil-soluble initiator. It was found that the dosage of trapped radical was far more than that from the initiators dissolved in the aqueous phase, therefore, the desorbed primary radical was the main origination of effective radical rather than the radicals from the initiators dissolved in the aqueous phase. The proportion of radical trapped by FeCl3, which was not affected by the temperature, decreased with the increase of initiator dosage and latex particle size and the decrease of the FeCl3 dosage. The polymerization rate and average number of radical per particle decreased with the increase of proportion of radical trapped by FeCl3.