Grauzeliene Sigita, Valaityte Deimante, Motiekaityte Greta, Ostrauskaite Jolita
Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, 50254 Kaunas, Lithuania.
Materials (Basel). 2021 May 20;14(10):2675. doi: 10.3390/ma14102675.
The development of polymers photopolymerized from renewable resources are extensively growing as fulfills green chemistry and green engineering principles. With the rapid growth of consumerism, research on innovative starting materials for the preparation of polymers may help to reduce the negative impact of petroleum-based plastic materials on the global ecosystem and on animal and human health. Therefore, bio-based crosslinked polymers have been synthesized from functionalized soybean oil and squalene by thiol-ene ultra-violet (UV) curing. First, thiol-ene UV curing of squalene was performed to introduce thiol functional groups. Then, hexathiolated squalene was used as a crosslinker in click UV curing of acrylated epoxidized soybean oil. Two photoinitiators, 2-hydroxy-2-methylpropiophenone and ethylphenyl (2,4,6-trimethylbenzoyl) phosphinate, were tested in different quantities. Rheological properties of the resins were monitored by real-time photorheometry. The characterization of obtained polymers was performed by differential scanning calorimetry, thermogravimetry, and Shore A hardness measurements. Polymers possessed higher storage modulus, thermal characteristics, Shore A hardness, and lower swelling value when ethylphenyl (2,4,6-trimethylbenzoyl) phosphinate was used as photoinitiator.
由可再生资源光聚合而成的聚合物发展迅速，因为其符合绿色化学和绿色工程原则。随着消费主义的迅速发展，对制备聚合物的新型起始材料的研究可能有助于减少石油基塑料材料对全球生态系统以及动物和人类健康的负面影响。因此，已通过硫醇-烯紫外（UV）固化由功能化大豆油和角鲨烯合成了生物基交联聚合物。首先，对角鲨烯进行硫醇-烯UV固化以引入硫醇官能团。然后，六硫醇化角鲨烯在丙烯酸化环氧化大豆油的点击UV固化中用作交联剂。测试了两种光引发剂，即2-羟基-2-甲基苯乙酮和乙基苯基（2,4,6-三甲基苯甲酰基）次膦酸酯的不同用量。通过实时光流变学监测树脂的流变性能。通过差示扫描量热法、热重分析法和邵氏A硬度测量对所得聚合物进行表征。当使用乙基苯基（2,4,6-三甲基苯甲酰基）次膦酸酯作为光引发剂时，聚合物具有更高的储能模量、热性能、邵氏A硬度和更低的溶胀值。
