Utilising the effect of reaction concentration to tune the physical properties of hyperbranched polymers synthesised using transfer-dominated branching radical telomerisation (TBRT)
Utilising the effect of reaction concentration to tune the physical properties of hyperbranched polymers synthesised using transfer-dominated branching radical telomerisation (TBRT)
复制标题
利用反应浓度的影响来调节使用转移主导的支化自由基调聚 (TBRT) 合成的超支化聚合物的物理性质
DOI：
10.1039/d3py00046j
复制
发表时间：
2023
影响因子：
4.6
通讯作者：
Cassin S
中科院分区：
文献类型：
--
作者：
Cassin S
具有新颖物理化学性质的复杂聚合物结构的形成在下一代先进材料的开发中具有重要意义。转移主导的支化自由基调聚（TBRT）的最近报告提供了一系列以前无法访问的大分子结构，利用自由基反应在调聚条件下容易访问的路线。在此，我们描述了通过TBRT合成的超支化聚合物的物理性质的变化，在进行调聚的反应浓度的操纵。通过仔细控制多乙烯基紫杉醇与调聚体的比例，我们已经表明，可以在各种反应浓度（0重量%（本体）-90重量%溶剂）下防止交联网络的形成，从而得到具有可调物理性质的材料。过量溶剂（≥70重量%溶剂）的影响通过所得材料的玻璃化转变温度的显著变化和最终结构中掺入的调聚体的减少来举例说明，提供了分子内环化的明确证据。
The formation of complex polymer architectures with novel physicochemical properties is of great importance in the development of next generation advanced materials. The recent reports of Transfer-dominated Branching Radical Telomerisation (TBRT) provide readily accessible routes to a range of previously inaccessible macromolecular architectures, utilising free radical reactions under telomerisation conditions. Herein, we describe the variation in the physical properties of hyperbranched polymers synthesised via TBRT, upon the manipulation of the reaction concentration at which the telomerisations were conducted. Through the careful control of multi-vinyl taxogen to telogen ratios, we have shown that the formation of a crosslinked network can be prevented at various reaction concentrations (0 wt% (bulk) – 90 wt% solvent), leading to materials with tuneable physical properties. The impact of excess solvent (≥70 wt% solvent) was exemplified by the significant variation of glass transition temperatures of the resulting materials and the reduction of telogen incorporated in the final structure, providing clear evidence of intramolecular cyclisation.