Durand Pierre-Luc, Chollet Guillaume, Grau Etienne, Cramail Henri
Laboratoire de Chimie des Polymères Organiques, UMR 5629, CNRS, Universitè de Bordeaux Bordeaux INP/ENSCBP, 16 Avenue Pey Berland 33600 Pessac France
ITERG F-33600 Pessac France.
RSC Adv. 2018 Dec 21;9(1):145-150. doi: 10.1039/c8ra07157h. eCollection 2018 Dec 19.
Bio-sourced polycarbonate networks have been synthesized from an alkene-functional fatty-acid based polycarbonate precursor. Cross-linked networks were created using the radical thiol-ene coupling reaction. The resulting polycarbonate materials exhibited versatile properties either influenced by the structure of the cross-linker or the cross-linker/olefin unit ratio. Indeed, the storage modulus above the glass transition temperature could be modulated from 0.9 to 8.9 MPa only by changing the type of cross-linker, 1,9-nonanedithiol 1,4-benzenedimethanethiol. The cross-linker/olefin unit ratio was also shown to largely impact the polycarbonate networks properties. An elongation at break of nearly 200% was reached when a low cross-linker/olefin ratio was applied. Moreover, functional polycarbonate networks bearing pendant thiol groups were obtained when an excess of dithiol was used with respect to olefin groups.
生物源聚碳酸酯网络是由基于烯烃官能化脂肪酸的聚碳酸酯前体合成的。通过自由基硫醇-烯偶联反应创建交联网络。所得聚碳酸酯材料表现出多种性能，这些性能受交联剂结构或交联剂/烯烃单元比例的影响。实际上，仅通过改变交联剂的类型，即1,9-壬二硫醇和1,4-苯二甲硫醇，玻璃化转变温度以上的储能模量就可以从0.9 MPa调节到8.9 MPa。交联剂/烯烃单元比例也被证明对聚碳酸酯网络性能有很大影响。当采用低交联剂/烯烃比例时，断裂伸长率接近200%。此外，当二硫醇相对于烯烃基团过量使用时，可获得带有侧链硫醇基团的功能性聚碳酸酯网络。
