The influence of chain scission on the molecular weight of conjugated polymers in a continuous flow reactor

被引：4
|
作者：
Jin, Seung-Hwan [1 ]
Lee, Chanseo [1 ]
Kim, Youngrok [1 ]
Jeon, Jinwoo [1 ]
Peterson, Gregory I. [2 ,3 ]
Hwang, Ye-Jin [1 ]
机构：
[1] Inha Univ, Educ & Res Ctr Smart Energy & Mat, Dept Chem & Chem Engn, 100 Inha Ro, Incheon 22212, South Korea
[2] Incheon Natl Univ, Dept Chem, 119 Acad Ro, Incheon 22012, South Korea
[3] Incheon Natl Univ, Res Inst Basic Sci, 119 Acad Ro, Incheon 22012, South Korea
来源：
POLYMER DEGRADATION AND STABILITY | 2023年 / 215卷
关键词：
Conjugated polymer; Stille polycondensation; Mechanochemical chain scission; Flow synthesis; Flow induced chain scission; ULTRASOUND-INDUCED BACKBONE; DEGRADATION; MACROMOLECULES; PERFORMANCE; KINETICS;
D O I：
10.1016/j.polymdegradstab.2023.110442
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The conjugated polymer PTB7 was found to undergo flow-induced chain scission under conditions typically employed in the flow synthesis of conjugated polymers, supporting that polymer degradation is a key side reaction that can influence the molecular weight of conjugated polymers synthesized in flow. Flow synthesis is becoming an increasing important method for the rapid and reproducible synthesis of conjugated polymers with optimal molecular weight. Increasing the length of time the polymerization solution remains in the flow system (the residence time), initially leads to an increase in molecular weight, but declines are observed at longer residence times. Our results support that conjugated polymers undergo mechanochemical chain scission in flow and that reactor temperature, polymer molecular weight, and polymer concentration are important factors that influence the extent of degradation. These results should aid in the future optimization of conjugated polymer syntheses in flow.
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页数：7
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