The kinetics and mechanism of the direct fluorination of polyethylenes

被引：41

作者：

Kharitonov, AP ^{[1
]}

Taege, R

Ferrier, G

Piven, NP

机构：

[1] Russian Acad Sci, Inst Energy Problems, Chem Phys Branch, Chernogolovka 142432, Moscow Region, Russia

[2] Air Prod GmbH, Fluorine Technol, D-45523 Hattingen, Germany

[3] Air Prod PLC, COE Packaged Gases, Crewe CW1 6BT, Cheshire, England

来源：

SURFACE COATINGS INTERNATIONAL PART B-COATINGS TRANSACTIONS | 2005年 / 88卷 / 03期

关键词：

direct fluorination; polyethylene; fluorinated layer; kinetics; mechanism;

D O I：

10.1007/BF02699574

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two types of low-density polyethylene (LOPE), five types of high-density polyethylene (HOPE), poly(vinyl fluoride) (PVF) and poly(vinylidene fluoride) (PVDF) were studied. The fluorination of LOPE and HOPE is a diffusion-controlled process and proceeds via a branched chain mechanism following an induction period. Initiation of the reaction takes place via the reaction of molecular fluorine with the C-H bond. The rate of fluorination of HOPE exceeds that of LOPE. PVDF cannot be fluorinated even at temperatures as high as 430K and/or under UV irradiation. The kinetics associated with the formation and termination of peroxy RO2center dot and fluorocarbon long-lifetime radicals was studied. It is mainly middle peroxy radicals that are formed at treatment conditions close to those used in industrial processes.

引用

页码：201 / 212

页数：12

共 37 条

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