摘要
首先采用种子乳液聚合法合成高羧基含量的核壳聚合物微球,然后利用碱液进行后处理,经渗透溶胀后可形成具有中空结构的聚合物微球,考察了单体加料工艺和聚合配方对聚合稳定性及微球形貌的影响,通过正交试验设计研究了不同的碱后处理条件对溶胀后微球形貌的影响程度,并进行了极差和方差分析.结果表明,控制单体加料速度和引入中间极性过渡层,有利于核壳聚合物微球的制备;碱液用量为影响溶胀后聚合物微球形貌的主要因素,碱处理温度次之,碱处理时间的影响相对较弱.当碱酸摩尔比为1~1.15,碱处理温度为80~90℃,碱处理时间为1~5 h时,制得的聚合物微球具有良好的中空结构.
Core-shell polymer latex particles containing carboxyl-groups inside were prepared via multistage seeded emulsion polymerization, and could evolved into hollow polymer particles after alkali post-treatment because of osmotic swelling. The effects of monomer feeding mode and polymerization recipes on the morphology of resultant particles were investigated. Orthogonal experiment design and range as well as variance analysis were utilized to figure out the influence degree on the morphology of alkali-treated particles from various alkali post-treatment conditions. Results showed that, controlling the feeding time of monomers and introducing polarity transition interlayer were beneficial to synthesizing particles with distinct core-shell structure. The alkali dosage had the most significant impact on the morphology of alkali-treated particles, followed by alkali post-treatment temperature, and the least effective for alkali post-treatment time. Moreover, polymer microspheres with stable and excellent hollow structure could be achieved with NaOH/MAA mole ratio range from 1 to 1. 15 ,alkali post-treatment temperature range from 80 to 90℃,and time range from 1 to 5 h.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2015年第8期927-932,共6页
Acta Polymerica Sinica
基金
黑龙江省青年自然科学基金(基金号QC2014C052)资助项目
关键词
中空微球
种子乳液聚合
渗透溶胀
极性过渡
正交试验
Hollow particles, Seeded emulsion polymerization, Osmotic swelling, Polarity transition, Orthogonal experiment
作者简介
通讯联系人，E-mail：weideng@hrbust．edu．cn；
kancy@tsinghua．edu．cn
