论文部分内容阅读
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.
First, the core-shell polymer microspheres with high carboxyl content were synthesized by seed emulsion polymerization, and then treated with lye for post-treatment. The polymer microspheres with hollow structure were formed after infiltration and swelling. The effects of monomer addition process and polymerization formula The effects of different alkali treatment conditions on morphology of microspheres after swelling were studied by orthogonal design and the range and variance analysis were carried out.The results showed that the control single The addition rate of bulk material and the introduction of intermediate polarity transition layer are conducive to the preparation of core-shell polymer microspheres. The amount of lye is the main factor affecting the morphology of the polymer microspheres after swelling. The alkali treatment temperature followed by alkali treatment time Is relatively weak.When the molar ratio of alkali to acid is 1 ~ 1.15, alkali treatment temperature is 80 ~ 90 ℃, alkali treatment time is 1 ~ 5 h, the obtained polymer microspheres have good hollow structure.