The objective of this study is to synthesis biomass-based plasticizer epoxy p-phenylenedioleic acid ester (EPAE) using linoleic acid as raw materials via esterification and epoxidation. EPAE was used as main plasticizer of polyvinyl chloride (PVC) to replace diisobutyl phthalate (DIBP). The plasticizing effect of EPEA on the performance of PVC films was investigated. The results showed that epoxy groups were covalently bonded on branched chains of EPAE. EPAE play a plasticizing role by forming hydrogen bond between epoxy group and a-hydrogen on PVC. When the mass of EPAE was 0.8 g in 2 g PVC, Tg of flexible PVC reached 36.1°C, the elongation at break of flexible PVC was 321.12 ± 6.13%, while the tensile strength reached 19.45 ± 1.35%. The transmittance of DIBP-0.8 and EPAE-0.8 at 800 nm is nearly 70%, indicating relatively high homogeneous amorphous aggregation structures. EPAE showed marginal resistance to volatilization and solvent extraction. The mechanism behind the results was discussed.

中文翻译：

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用于高透明聚氯乙烯薄膜的具有优异耐久性的生物质基增塑剂的合成

本研究的目的是合成生物质基增塑剂环氧树脂-苯二油酸酯（EPAE），以亚油酸为原料，经酯化和环氧化反应。EPAE作为聚氯乙烯（PVC）的主要增塑剂替代邻苯二甲酸二异丁酯（DIBP）。研究了EPEA对PVC薄膜性能的增塑作用。结果表明环氧基团共价键合在EPAE的支链上。EPAE通过在PVC上的环氧基与α-氢之间形成氢键而起到增塑作用。当EPAE在2g PVC中的质量为0.8g时，软质PVC的Tg达到36.1℃，软质PVC的断裂伸长率为321.12±6.13%，而拉伸强度达到19.45±1.35%。DIBP-0.8 和 EPAE-0.8 在 800 nm 处的透射率接近 70%，表明具有较高的均质无定形聚集结构。EPAE 对挥发和溶剂萃取显示出边际阻力。讨论了结果背后的机制。