End-capped biobased saturated polyesters as effective plasticizers for PVC
End-capped biobased saturated polyesters as effective plasticizers for PVC
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DOI：
10.1016/j.polymertesting.2020.106406
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发表时间：
2020-05
期刊：
影响因子：
5.1
通讯作者：
Vanessa A. Pereira;A. Fonseca;C. Costa;A. Ramalho;J. Coelho;A. Serra
中科院分区：
文献类型：
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作者：
Vanessa A. Pereira;A. Fonseca;C. Costa;A. Ramalho;J. Coelho;A. Serra
在这项工作中，使用生物基封端饱和聚酯 (SP) 制备了柔性 PVC 配方。 SP 首次用长烷基链（支链（2-十四烷基十八烷-1-醇，TDOD）和无支链（辛醇，Oc））封端，旨在增加与 PVC 基体的相容性、自由体积并减少迁移。用 SP 增塑的 PVC 样品的性能与用对苯二甲酸二辛酯 (DOTP) 增塑的 PVC 样品进行了比较。Tg (60 °C) 显着降低观察到 PVC 增塑薄膜的 Tg<80°C，并且用 Oc 封端的 SP 增塑的样品的断裂伸长率 (ε) 值与 DOTP 增塑的 PVC 非常接近。迁移测试表明，用 SP 增塑的 PVC，特别是使用 Oc 封端的 SP 增塑的样品，其热机械性能的下降几乎可以忽略不计。总体而言，结果表明用 Oc 封端的 SP 是 DOTP 的可靠替代品。
In this work, flexible PVC formulations were prepared using biobased end-capped saturated polyesters (SPs). The SPs were end-capped for the first time with long alkyl chains (both branched (2-tetradecyloctadecan-1-ol, TDOD) and unbranched (octanol, Oc) aiming to increase the compatibility with PVC matrix, free volume and reduce migration. The properties of PVC samples plasticized with the SPs were compared with a PVC sample plasticized with dioctyl terephthalate (DOTP). A significant decrease in theTg(60 °C <ΔTg<80 °C) of PVC plasticized films was observed, and the samples plasticized with the SP end-capped with Oc presented an elongation at break (ε) value very close to the DOTP-plasticized PVC. Migration tests revealed that PVC plasticized with SPs have lower amount of extractables, especially those using Oc end-capped SP. Also, the decrease of thermomechanical properties of the samples plasticized using SPs is almost negligible when compared with the samples plasticized with DOTP. Overall, the results showed that the SP end-capped with Oc is a reliable alternative to DOTP.