In this work, rosin‐based plasticizer was synthesized by Diels–Alder (DA) and esterification. First, the maleopimaric acid (RT) was obtained by DA between the double bond of rosin and maleic anhydride. Then, the carboxyl group and anhydride group of RT was esterified with tetrahydro geraniol to obtain the rosin‐based polyacid esters (RTT) under the catalysis of p‐toluene sulfonic acid. The structure of RT and RTT was detected by FTIR and ¹H‐NMR. RTT was used as main plasticizer to obtain plasticized polyvinyl chloride (PVC) materials and compared with DOP. The results showed that RTT improved the thermal stability and reduced T_g of PVC film. Plasticized PVC films had excellent mechanical properties with the elastic modulus of −4,793.67 MPa and tensile strength of −111.86 MPa, higher than that of pure PVC and DOP‐6. RTT showed better volatility stability, migration, and solvent extraction in PVC compared to DOP. J. VINYL ADDIT. TECHNOL., 26:180–186, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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松香衍生的聚氯乙烯增塑剂：合成，结构和性能

在这项工作中，通过Diels–Alder（DA）和酯化合成了松香基增塑剂。首先，通过松香和马来酸酐的双键之间的DA获得马来海马酸（RT）。然后，在对甲苯磺酸的催化下，用四氢香叶醇酯化RT的羧基和酸酐基，得到松香基多元酸酯（RTT）。RT和RTT的结构通过FTIR和¹ H-NMR检测。RTT用作主要增塑剂，以获得增塑的聚氯乙烯（PVC）材料，并与DOP进行了比较。结果表明，RTT改善了热稳定性并降低了T _gPVC膜。增塑的PVC膜具有优异的机械性能，其弹性模量为-4,793.67 MPa，拉伸强度为-111.86 MPa，高于纯PVC和DOP-6。与DOP相比，RTT在PVC中显示出更好的挥发性稳定性，迁移和溶剂萃取。J.乙烯基添加物。TECHNOL。，26：180–186，2020.©2019塑料工程师协会