Herein, as two types of rational designed thermal stabilizers, the maleic acid-sorbitol ester (MS) and zinc maleic acid-sorbitol ester complex (Zn-MS) with unsaturated carbon double bonds were synthesized to improve the initial whiteness and long-term thermal stability for polyvinyl chloride (PVC). The successfully synthesized MS and Zn-MS had three functions of replacing the labile chlorine on the PVC chains, reducing the “zinc burning” and absorbing the hydrogen chloride (HCl) released by PVC. After introducing the MS and Zn-MS, the stability time of PVC could be extended to more than 140 min and 120 min at 180 °C, respectively. Additionally, both the MS and Zn-MS had showed lower-torque effect on rheology and less-implications for plate-out in PVC. The addition of MS and Zn-MS could promote the dispersion of composition in the PVC matrix and endow the PVC with better strength and toughness. Meanwhile, in contrast with ZnSt₂ or CaSt₂, the transparency of PVC sheet stabilized by MS and Zn-MS also showed the higher transmittance, which severally reached to 57.2% and 72.1%.

在此，作为两种合理设计的热稳定剂，合成了具有不饱和碳双键的马来酸-山梨糖醇酯（MS）和马来酸锌-山梨糖醇锌络合物（Zn-MS），以改善初始白度和长期热稳定性。对聚氯乙烯（PVC）的稳定性。成功合成的MS和Zn-MS具有取代PVC链上不稳定氯，减少“锌燃烧”和吸收PVC释放的氯化氢（HCl）的三种功能。引入MS和Zn-MS后，在180°C下PVC的稳定时间可以分别延长至140分钟以上和120分钟以上。此外，MS和Zn-MS均显示出对流变的较低扭矩效应，对PVC中的积垢影响较小。MS和Zn-MS的加入可以促进组合物在PVC基质中的分散，并赋予PVC更好的强度和韧性。同时，与ZnSt相反₂或CaSt ₂，用MS和Zn-MS稳定的PVC片的透明度也显示出较高的透射率，分别达到57.2％和72.1％。