Bio-based plasticizers have attracted more attention due to their sustainability. In order to replace dioctyl phthalate (DEHP) in poly(vinyl chloride) (PVC) products, the authors designed and synthesized a kind of bio-based plasticizer based on dehydroabietic acid and castor oil (BPDC). Its chemical structure was characterized. The performance of PVC films plasticized with BPDC was investigated and compared with that of DEHP. The obtained bio-based plasticizer with flexible long alkane chains and polar benzene ring groups showed improved volatility resistance and solvent extraction resistance. The introduction of BPDC improved the thermal stability of PVC films due to the thermal stability of the ester groups and benzene groups of BPDC. The reduction in the glass transition temperature and increase in the elongation at break of PVC films indicated an effective plasticizing efficiency.

中文翻译：

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聚氯乙烯抗迁移性提高的生物基增塑剂的合成

生物基增塑剂因其可持续性而受到更多关注。为了替代聚氯乙烯（PVC）产品中的邻苯二甲酸二辛酯（DEHP），作者设计合成了一种以脱氢松香酸和蓖麻油（BPDC）为基础的生物基增塑剂。对其化学结构进行了表征。研究了用 BPDC 增塑的 PVC 薄膜的性能，并与 DEHP 进行了比较。得到的具有柔性长链烷烃链和极性苯环基团的生物基增塑剂显示出改善的耐挥发性和耐溶剂萃取性。由于BPDC的酯基和苯基的热稳定性，BPDC的引入提高了PVC薄膜的热稳定性。