Koler Amadeja, Kolar Mitja, Jeřábek Karel, Krajnc Peter
PolyOrgLab, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia.
Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna Pot 113, SI-1000 Ljubljana, Slovenia.
Polymers (Basel). 2021 Aug 14;13(16):2721. doi: 10.3390/polym13162721.
With the aim to study the influence of monomer ratio in poly(high internal phase emulsions) (polyHIPEs) on the polymer network architecture and morphology of poly(vinylbenzyl chloride-co-divinylbenzene-co-styrene) after hypercrosslinking via the internal Friedel-Crafts process, polyHIPEs with 80% overall porosity were prepared at three different initial crosslinking degrees, namely 2, 5, and 10 mol.%. All had typical interconnected cellular morphology, which was not affected by the hypercrosslinking process. Nitrogen adsorption and desorption experiments with BET and -plot modelling were used for the evaluation of the newly introduced nanoporosity and in combination with elemental analysis for the evaluation of the extent of the hypercrosslinking. It was found that, for all three initial crosslinking degrees, the minimum amount of functional monomer, 4-vinylbenzyl chloride, was approximately 30 mol.%. Hypercrosslinking of polymers with lower concentrations of functional monomer did not result in induction of nanoporosity while the initial crosslinking degree had a much lower impact on the formation of nanoporosity.
为了研究聚（高内相乳液）（polyHIPEs）中单体比例对通过内部傅-克反应超交联后的聚（氯乙烯苄基-共-二乙烯基苯-共-苯乙烯）聚合物网络结构和形态的影响，制备了三种不同初始交联度（即2、5和10 mol.%）、总体孔隙率为80%的polyHIPEs。所有样品均具有典型的相互连通的蜂窝状形态，且不受超交联过程的影响。采用BET和t-plot模型进行氮吸附和解吸实验，以评估新引入的纳米孔隙率，并结合元素分析评估超交联程度。结果发现，对于所有三种初始交联度，功能单体4-乙烯基苄基氯的最小用量约为30 mol.%。功能单体浓度较低的聚合物进行超交联不会诱导纳米孔隙率的产生，而初始交联度对纳米孔隙率形成的影响要小得多。
