The effect of contact with PTFE tape on the moisture cure of an alkoxysilicone sealant

被引：6

作者：

Comyn, J

De Buyl, F

Subramanian, C

机构：

[1] Univ Loughborough, Inst Polymer Technol & Mat Engn, Loughborough LE11 3TU, Leics, England

[2] NV Dow Corning SA, B-7180 Seneffe, Belgium

[3] Dow Corning Corp, Midland, MI 48686 USA

来源：

INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | 2002年 / 22卷 / 04期

关键词：

silicones; contact angles; X-ray photoelectron spectroscopy; cure/hardening; tack;

D O I：

10.1016/S0143-7496(02)00012-X

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

PTFE tape can be placed in contact with silicone glazing sealants, before they cure by reaction with water vapour from the atmosphere. Upon removal of the tape after cure, a smooth and tack free silicone surface remains. This phenomenon has been investigated by surface analysis (X-ray photoelectron spectroscopy and contact angle measurement) measurement of tack and weight changes of the tape, and it is concluded that what is involved is the rapid entry of liquid components from the silicone into pores in the PTFE. Cure depths have been measured at various times for sealant exposed at 25degreesC and 75.4% relative humidity, both with and without the PTFE tape. The tape has no effect on the rate of cure. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：331 / 336

页数：6

共 14 条

[1]

BRYDSON JA, 1989, PLASTIC MAT

[2]

Chehimi M. M, 1999, ADHESION PROMOTION T

[3] CONTACT ANGLES OF LIQUIDS ON FILMS FROM EMULSION ADHESIVES, AND CORRELATION WITH THE DURABILITY OF ADHESIVE BONDS TO POLYSTYRENE [J].