Precision Synthesis of Narrow Polydispersity, Ultrahigh Molecular Weight Linear Aromatic Polymers by A2 + B2 Nonstoichiometric Step-Selective Polymerization

被引：116

作者：

Cruz, Alfredo R. ^{[1
]}

Hernandez, M. Carmen G. ^{[2
]}

Guzman-Gutierrez, Maria T. ^{[1
]}

Zolotukhin, Mikhail G. ^{[1
]}

Fomine, Sergei ^{[1
]}

Morales, Salvador L. ^{[1
]}

Krichedorf, Hans ^{[3
]}

Wilks, Edward S.

Cardenas, Jorge ^{[4
]}

Salmon, Manuel ^{[4
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Invest Mat, CU, Mexico City 04510, DF, Mexico

[2] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, CU, Mexico City 04510, DF, Mexico

[3] Inst Tech & Makromol Chem, D-20146 Hamburg, Germany

[4] Univ Nacl Autonoma Mexico, Inst Quim, CU, Mexico City 04510, DF, Mexico

来源：

MACROMOLECULES | 2012年 / 45卷 / 17期

关键词：

CHAIN COMPETITION KINETICS; PRECIPITATION POLYCONDENSATION; HYPERBRANCHED POLYMERS; POLYMERIZATION; SUPERELECTROPHILES; GROWTH;

D O I：

10.1021/ma301691f

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A reliable and practical approach is offered for the two critical fundamental challenges that remain in step-growth polymerization: synthesis of narrow polydispersity and ultrahigh molecular weight polymers. The polymers are obtained by superacid catalyzed polyhydroxyalkylation involving two consecutive steps - slow and fast. Polymer syntheses with decrease in reactivity of intermediates lead to narrow polydispersity polymers, while nonstoichiometric reactions result in polymers of high and ultrahigh molecular weight. Linear aromatic polymers with ultra high molecular weight M-n > 1 000 000 and narrow polydispersity (M-w/M-n = 1.15-1.16) have been obtained. An unusual step-selective mechanism is suggested for the formation of these polymers.

引用

页码：6774 / 6780

页数：7

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