Universite Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France.
Wacker Chemie AG, Johannes-Hess-Straße 24, 84489 Burghausen, Germany.
Biomacromolecules. 2024 Sep 9;25(9):6060-6071. doi: 10.1021/acs.biomac.4c00728. Epub 2024 Aug 22.
This work aims at synthesizing tailor-made poly(vinyl alcohol--vinyl acetate) (PVA) amphiphilic copolymers, obtained by alcoholysis of poly(vinyl acetate) (PVAc) that could display improved properties as stabilizers compared to commercially available PVAs. Well-defined PVAs with different alcoholysis degrees were produced from a library of PVAc homopolymers synthesized by macromolecular design via interchange of xanthate polymerization and exhibiting different degrees of polymerization degrees. Subsequently, these PVAs were evaluated as stabilizers in the emulsion copolymerization of VAc and vinyl neodecanoate (VERSA 10, referred to as V10) and compared to a commercially available reference PVA obtained by alcoholysis of PVAc formed by conventional radical polymerization. In all cases, stable latexes were obtained and compared in terms of their colloidal characteristics. To identify the best stabilizer candidate, the amount of PVA remaining in water and not participating to the particle stabilization was evaluated in each case.
这项工作旨在合成定制的聚（乙烯醇-醋酸乙烯酯）（PVA）两亲嵌段共聚物，通过对聚（醋酸乙烯酯）（PVAc）的醇解获得，与市售的 PVAs 相比，这些共聚物作为稳定剂具有更好的性能。通过黄原酸酯聚合的交换进行大分子设计合成的一系列 PVAc 均聚物，得到了具有不同醇解度的、具有不同聚合度的、定义良好的 PVAs。随后，将这些 PVA 作为稳定剂，用于 VAc 和新癸酸乙烯酯（VERSA 10，简称 V10）的乳液共聚，并与通过常规自由基聚合形成的 PVAc 醇解得到的市售参考 PVA 进行比较。在所有情况下，都得到了稳定的乳液，并从胶体特性方面进行了比较。为了确定最佳的稳定剂候选物，在每种情况下都评估了留在水中且不参与颗粒稳定的 PVA 的量。
