On the study of polyurethane ionomer - Part I

CCUR > College of Natural Science and Engineering > College of Science > Department of Chemistry & Graduate Institute of Applied Chemistry > journal articles > Item 987654321/2982

Please use this identifier to cite or link to this item: https://irlib.pccu.edu.tw/handle/987654321/2982

Title:	On the study of polyurethane ionomer - Part I
Authors:	Chwang CP Wang CL Kuo YM Lee SN Chao A Chao DY
Contributors:	化學系
Keywords:	polyurethane ionomer dimethylol propionic acid ES-200
Date:	2002
Issue Date:	2009-12-11 09:44:12 (UTC+8)
Abstract:	The reaction of toluene diisocyanate (TDI) with dimethylol propionic acid (DMPA) or diaminopentane sulphonic acid sodium salt (ES-200) and other additives to form the structure of anionic polyurethane (PU) ionomer molecule has been proven by FT-IR spectroscopy. In aqueous solution, the surface tension of anionic PU ionomer molecule is seen to slightly increase with increasing concentration of ES-200. This is because the adsorption of hydrophobic groups of ionomer molecules at the surface of aqueous solution becomes even more ordered. Under the same experimental Conditions, the surface tension of anionic PU ionomer molecule appears to slightly decrease with increasing concentration of DMPA, as a result of increased hydrophobic groups of ionomer molecule adsorbed at the surface of aqueous solution. The number average particle size of anionic PU ionomer molecule in aqueous solution appears to steadily increase with an increase in the concentration of DMPA or ES-200. This is because the intermolecular interaction between ionomer-ionomer molecules themselves and between ionomer-water molecules may increase the free volume of anionic PU ionomer molecule, thus causing their number average particle size to increase. Experimental results indicate that both the tensile strength and the modulus of self-cured film of anionic PU ionomer molecule appear to decrease with increasing concentration of DMPA or ES-200, as a result Of intramolecular interaction. However, the elongation of self-cured film of anionic PU ionomer molecule is seen to increase with increasing concentration of DMPA or ES-200. This may be the result Of weakening crosslinking due to strong intramolecular interaction of ionomer molecule. For the peel strength of self-cured film of anionic PU ionomer coated on the fabric (30% polyester/70% cotton), it has been found that the peel strength increases with increasing concentration of DMPA or ES-200, as a result of increased hydrophilic interaction between ionomer molecules themselves. Copyright (C) 2002 John Wiley Sons, Ltd.
Relation:	POLYMERS FOR ADVANCED TECHNOLOGIES Volume: 13 Issue: 3-4 Special Issue: Sp. Iss. SI Pages: 285-292
Appears in Collections:	[Department of Chemistry & Graduate Institute of Applied Chemistry ] journal articles

Files in This Item:

File	Description	Size	Format
index.html		0Kb	Text	538	View/Open

Loading...