Atom Transfer Radical Polymerization of End-Functionalized Hydrogen-Bonding Polymers and Resulting Polymer Miscibility
Atom Transfer Radical Polymerization of End-Functionalized Hydrogen-Bonding Polymers and Resulting Polymer Miscibility
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DOI：
10.1021/ma901822k
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发表时间：
2009-11
期刊：
影响因子：
5.5
通讯作者：
M. Wrue;Aaron C Mcumber;M. Anthamatten
中科院分区：
文献类型：
--
作者：
M. Wrue;Aaron C Mcumber;M. Anthamatten
本文报道了端功能化氢键聚合物的合成及其熔融共混行为的研究。采用原子转移自由基聚合（ATRP）和原子转移自由基偶联（ATRC）方法合成了脲基嘧啶酮（UPy）功能化的聚苯乙烯和聚甲基丙烯酸甲酯。使用尺寸排阻色谱法观察溶液中UPy端基的聚集。采用光学显微镜和差示扫描量热法研究了UPy端基对熔融共混物相容性的影响。相对于未官能化的母体共混物，将缔合基团结合到任一共混物组分的一端上降低了可溶解性。对于其中两种组分均用缔合端基单官能化的共混物，也观察到较低的溶解性。最大的下降，观察到的共混物含有遥爪UPy官能化的聚合物，这是不混溶的整个ent.
The synthesis of end-functionalized hydrogen-bonding polymers and the investigation of their melt phase blend behavior are reported. Monofunctional and telechelic ureidopyrimidinone (UPy)-functionalized poly(styrene)s and poly(methyl methacrylate)s were synthesized using atom transfer radical polymerization (ATRP) followed by atom transfer radical coupling (ATRC). Aggregation of UPy end-groups in solution was observed using size exclusion chromatography. The effect of UPy end-groups on blend miscibility in the melt state was studied using optical microscopy and differential scanning calorimetry. The incorporation of associating groups onto one end of either blend component decreases miscibility relative to unfunctionalized parent blends. Lower miscibility was also observed for blends in which both components were monofunctionalized with associating end-groups. The largest decrease in miscibility was observed for blends containing telechelic UPy-functionalized polymers, which were immiscible across the ent...