Revisiting the polyvinylidene fluoride heterogeneous alkaline reaction mechanism in propan-2-ol: An additional hydrogenation step

被引：11

作者：

Ahmed, Mohamed Magdi ^{[1
]}

Hruza, Jakub ^{[2
]}

Stuchlik, Martin ^{[2
]}

Antos, Vojtech ^{[2
]}

Mullerova, Jana ^{[3
]}

Rezanka, Michal ^{[2
]}

机构：

[1] Tech Univ Liberec, Fac Mechatron Informat & Interdisciplinary Studie, Studentska 1402-2, Liberec 46117, Czech Republic

[2] Tech Univ Liberec, Inst Nanomat Adv Technol & Innovat, Studentska 1402-2, Liberec 46117, Czech Republic

[3] Tech Univ Liberec, Fac Sci Humanities & Educ, Studentska 1402-2, Liberec 46117, Czech Republic

来源：

EUROPEAN POLYMER JOURNAL | 2021年 / 156卷

关键词：

Polyvinylidene fluoride; Nanofibers; Catalytic transfer hydrogenation; Surface modification; Polyvinylidene fluoride degradation mechanism; PHASE-TRANSFER CATALYSIS; POLY(VINYLIDENE FLUORIDE); SURFACE MODIFICATION; VINYLIDENE FLUORIDE; DEHYDROFLUORINATION; PVDF; DEGRADATION;

D O I：

10.1016/j.eurpolymj.2021.110605

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 reaction between polyvinylidene fluoride (PVDF) nanofibers and sodium hydroxide in the presence of propan-2-ol (IPA) as phase transfer catalyst (PTC) was studied. In this work, we propose a new reaction mechanism for the formation of the conjugate structure. FTIR and Raman spectra were analyzed with a focus on symmetry basics, which subsequently lead to a clear structure determination and imply that there is in fact an additional hydrogenation step to the dehydrofluorination mechanism previously reported. Sodium isopropylalcoholate catalyzes the Csp2-F bond cleavage in a transfer hydrogenation step and results in the formation of Csp2-H bond, a mechanism supported by the presence of acetone. These findings are of particular importance to PVDF alkaline reaction, it indicates that the use of IPA as PTC alter the reaction mechanism.

引用

页数：6

共 22 条

[21] Sodium hydroxide-catalyzed transfer hydrogenation of carbonyl compounds and nitroarenes using ethanol or isopropanol as both solvent and hydrogen donor [J].

Wang, Dong ;

Deraedt, Christophe ;

Ruiz, Jaime ;

Astruc, Didier .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2015, 400 :14-21

[22]

ZERBI G, 1990, NATO ADV SCI I B-PHY, V248, P345

← 1 2 3 →