Long-chain-branched poly(aryl ether sulfone)-poly(tetrahydrofuran) multiblock copolymers (PES-BPTHF) composed of hard linear and soft branching segments were synthesized from bromo-terminated poly(tetrahydrofuran) and hydroxy-terminated poly(aryl ether sulfone). A study on the effect of concentration on polymerization behavior revealed that soluble powder was obtained at the optimized reaction concentration of 7 wt%. Gelation and intramolecular cyclization were observed at high and low concentrations, respectively. The microphase-separated morphology of PES-BPTHF was confirmed by atomic force microscopy, small-angle X-ray scattering (SAXS), and dynamic mechanical analysis (DMA) measurements. Fewer entangled poly(tetrahydrofuran) segments were detected in PES-BPTHF than in PES-PTHF by SAXS, DMA and tensile measurements. Rheological measurements suggested high chain entanglement of PES-BPTHF in its melt phase. It is interesting to note that the polymer chains in the soft domains become less entangled and more reminiscent of hyperbranched architectures, whereas the overall chain entanglements are increased due to the long-chain-branched structure. Long-chain-branched poly(aryl ether sulfone)-poly(tetrahydrofuran) multiblock copolymers composed of hard linear and soft branching segments were synthesized from bromo-terminated poly(tetrahydrofuran) and hydroxy-terminated poly(aryl ether sulfone). Optimization of the polymerization conditions afforded soluble powder at a reaction concentration of 7 wt%. Microphase-separated morphology was observed for the branched multiblock copolymers. Compared with the corresponding linear multiblock copolymer, the branched polymer chains in the soft domains become less entangled and more reminiscent of hyperbranched architectures, whereas the overall chain entanglements are increased due to the long-chain-branched structure.

中文翻译：

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长链支化聚（芳醚砜）-聚（四氢呋喃）多嵌段共聚物的合成及性能

以溴封端的聚（四氢呋喃）和羟基封端的聚（芳醚砜）为原料合成了由硬直链段和软支链段组成的长链支化聚（芳醚砜）-聚（四氢呋喃）多嵌段共聚物（PES-BPTHF） ）。浓度对聚合行为影响的研究表明，在 7 wt% 的优化反应浓度下获得了可溶性粉末。分别在高浓度和低浓度下观察到凝胶化和分子内环化。PES-BPTHF 的微相分离形态通过原子力显微镜、小角 X 射线散射 (SAXS) 和动态力学分析 (DMA) 测量得到证实。通过 SAXS、DMA 和拉伸测量，在 PES-BPTHF 中检测到的缠结聚（四氢呋喃）链段少于 PES-PTHF。流变学测量表明 PES-BPTHF 在其熔融相中有高链缠结。有趣的是，软域中的聚合物链变得更少缠结，更让人联想到超支化结构，而由于长链支化结构，整体链缠结增加。由溴封端的聚（四氢呋喃）和羟基封端的聚（芳醚砜）合成了由硬直链段和软支链段组成的长链支化聚（芳醚砜）-聚（四氢呋喃）多嵌段共聚物。聚合条件的优化提供了反应浓度为 7 wt% 的可溶性粉末。对于支化多嵌段共聚物，观察到微相分离的形态。与相应的线性多嵌段共聚物相比，