Authors: Katime, Issa; Meaurio, Emilio; Cesteros, Luis C.; Mendizábal, Eduardo

Source: Applied Spectroscopy, Volume 57, Issue 7, Pages 208A-220A and 729-892 (July 2003) , pp. 829-834(6)

Publisher: Society for Applied Spectroscopy

Abstract:

This paper reports an FT-IR study of blends of poly(mono-n-alkyl itaconates) with poly(N,N-dimethylacrylamide) (PDMA) and poly(ethyloxazoline) (PEOX). Strong hydrogen bonding has been found, and both polybases have shown similar acceptor strengths. Derivative techniques show asymmetric profiles for the free carbonyl band of the polybases, resulting in shifted band locations. The extent of the interassociation has been estimated by spectral curve fitting of the polybase carbonyl band. The results show that the interaction degree in blends with PEOX does not depend on the length of the poly(monoalkyl itaconate) side group, while an interassociating ability loss is observed in blends with PDMA as the side-group size of the polyacid increases. This different behavior is attributed to the greater interspacing between vicinal carbonyl groups in PEOX. This band shows conformational sensitivity and reflects the conformational changes that occur as the steric hindrances present in the medium (due to the bulky side groups of the polyacids) increase.

Keywords: HYDROGEN BONDING; POLY MONO-N-ALKYL ITACONATES; POLY N N-DIMETHYLACRYLAMIDE; POLY ETHYLOXAZOLINE; POLYBASES; POLYACIDS; FT-IR; FOURIER TRANSFORM INFRARED SPECTROSCOPY; SPECIFIC INTERACTIONS

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370203322102924

Publication date: 2003-07-01

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