Bj. Traskmorrell et al., THERMOANALYTICAL AND FT-IR CHARACTERISTICS OF FABRICS FINISHED WITH BTCA CHLOROACETATES .1. DSC AND TGA RESULTS/, Textile research journal, 66(10), 1996, pp. 612-621
Cotton durable press (DP) finishes of 1,2,3,4- butanetetracarboxylic a
cid (BTCA) catalyzed with sodium dichloroacetate, sodium monochloroace
tate. or sodium acetate (SDCA, SMCA, or SA) were prepared at four acid
/catalyst ratios, and catalyst controls were also treated. Thermal ana
lyses were performed using differential scanning calorimetric (DSC) an
d thermogravimetric (TG) techniques. Overlaid DSC or TG thermograms In
dicated few visible instances of progressive changes produced with var
ying ratios of BTCA/catalyst. Differences in finishes were assessed wh
en means and standard errors were tabulated. Characterization of this
series involved either seventeen or five individual parameters, depend
ing on whether the finish produced two or one weight. loss region(s).
Some thermal parameters, when plotted versus catalyst ratios of 1/ 0.5
, 1/1, 1/1.5, and 1/2, produced a peak (or a minimum) instead of stead
ily increasing, decreasing, or remaining level, as found in earlier st
udies. Finish identification of BTCA/SDCA was rapid; recognition of BT
CA/SMCA or BTCA/SA was more complicated. All BTCA/acetate catalyzed fi
nishes were easily distinguished from BTCA/sodium hypophosphite finish
ed fabrics or 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) finish
es. Most distinguishing thermal features are related to catalyst. Part
II discusses TGA/FT-IR studies of BTCA/acetate catalyzed samples.