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Post-polymerization modification of poly(ethyl sorbate) leading to various alternating copolymers
Polymer ( IF 4.1 ) Pub Date : 2022-11-22 , DOI: 10.1016/j.polymer.2022.125538
Yongyao Lei , Yougen Chen

Eight novel alternating copolymers that are not accessible with general methodologies have been synthesized by the post-polymerization modification of poly(propylene-alt-allyl alcohol)100 (PPAA100). PPAA100 is obtained from a group transfer polymerization (GTP) made poly(ethyl sorbate)100 (PES100) by first hydrogenating its backbone double bonds followed by reducing its pendent esters to hydroxyl groups using lithium aluminum hydride. The post-polymerization modification of PPAA100 includes its condensation reactions with three reactive electrophiles, and its Mitsunobu reactions with five nucleophiles. The chemical transformations of the hydroxyl group to other functionalities have resulted in the eight unique head-to-head alternating copolymers which possess a fixed propylene structural unit and an allyl alcohol derived monomeric unit, such as allyl ester, sulfonate, phosphate, ether, halide, and imide. The chemical structures of the obtained polymers are verified by 1H and 13C NMR and FT-IR spectroscopies. Finally, the thermal properties of the resulting polymers with different side groups are studied.



中文翻译:

聚(山梨酸乙酯)的聚合后改性导致各种交替共聚物

通过聚(丙烯-alt-烯丙醇)100PPAA 100 )的聚合后改性合成了八种用一般方法无法获得的新型交替共聚物。PPAA 100是通过基团转移聚合 (GTP) 制成的聚山梨酸乙酯100 ( PES 100 ),首先对其主链双键进行氢化,然后使用氢化铝锂将其侧酯还原为羟基。PPAA 100的后聚合改性包括它与三个反应性亲电子试剂的缩合反应,以及它与五个亲核试剂的 Mitsunobu 反应。羟基向其他官能团的化学转化产生了八种独特的头对头交替共聚物,它们具有固定的丙烯结构单元和烯丙醇衍生的单体单元,例如烯丙基酯、磺酸酯、磷酸酯、醚、卤化物, 和亚胺。获得的聚合物的化学结构通过1 H 和13 C NMR 和 FT-IR 光谱学验证。最后,研究了所得具有不同侧基的聚合物的热性能。

更新日期:2022-11-27
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