Kinetics of moisture cure of silicone sealants

被引：23

作者：

Comyn, J

Day, J

Shaw, SJ

机构：

[1] De Montfort Univ, Dept Chem, Leicester LE1 9BH, Leics, England

[2] Def Res Agcy, Struct Mat Ctr, Farnborough GU14 6TD, Hants, England

来源：

JOURNAL OF ADHESION | 1998年 / 66卷 / 1-4期

关键词：

silicone sealant; fluorosilicone sealant; permeability to water vapour; amount of water needed for cure; kinetics of moisture cure; mechanism of moisture cure;

D O I：

10.1080/00218469808009970

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The depth of moisture cure (z) has been measured for lap joints in aluminium with a conventional sealant based on polydimethylsiloxane and one based on polytrifluoropropylmethylsiloxane. The cured sealant acts as a barrier to the permeation of water; any water which passes through this barrier causes further cure which thickens the barrier. The depth of cure is given by z=(2PVpt)(1/2), where P is the permeability coefficient of water in cured sealant, V is the volume of sealant which reacts with 1 mole of water, p is the vapour pressure of water and t is time.

引用

页码：289 / 301

页数：13