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Titolo:
SURFACE-ACTIVE PROPERTIES OF POLY(N-ALKYLSUBSTITUTED ACRYLAMIDE)S ANDTHEIR ADSORPTION ONTO POLYSTYRENE LATEX-PARTICLES IN WATER
Autore:
ASADA K; TATARA M; TAKAGI T; NAGAI K;
Indirizzi:
YAMAGATA UNIV,DEPT MAT SCI & ENGN YONEZAWA YAMAGATA 992 JAPAN YAMAGATA UNIV,DEPT MAT SCI & ENGN YONEZAWA YAMAGATA 992 JAPAN
Titolo Testata:
Polymer Journal
fascicolo: 2, volume: 28, anno: 1996,
pagine: 145 - 149
SICI:
0032-3896(1996)28:2<145:SPOPAA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
COPOLYMERS; POLYMERS; POLYMERIZATION; TEMPERATURE; DISPERSIONS; STABILITY; BEHAVIOR; CHAIN;
Keywords:
N-AKYLSUBSTITUTED ACRYLAMIDES; POLYSTYRENE LATEX; SURFACE TENSION; ADSORPTION; INTRAMOLECULAR HYDROPHOBIC MICRODOMAINS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
K. Asada et al., "SURFACE-ACTIVE PROPERTIES OF POLY(N-ALKYLSUBSTITUTED ACRYLAMIDE)S ANDTHEIR ADSORPTION ONTO POLYSTYRENE LATEX-PARTICLES IN WATER", Polymer Journal, 28(2), 1996, pp. 145-149

Abstract

Surface-active properties of copolymers of N,N-dimethylacrylamide (DMA) with n-alkylsubstituted acrylamides, namely as n-butylacrylamide (NBA), n-hexylacrylamide (NHA), n-octylacrylamide (NOA), n-dodecylacrylamide (NDA), and their adsorption onto polystyrene (PS) latex particleswere studied at 25 degrees C in water. Surface tension lowering (Delta gamma) at a concentration of 0.1 g dL(-1), where adsorption at air-water interface is close to saturation, increased with the content of N-alkylacrylamide units for respective copolymers containing different N-alkylacrylamide units. The dependence was stronger for copolymers with N-alkylacrylamides bearing the higher alkyl group. The amount of adsorption (W-s) onto PS particles at saturation also increased with thecontent of N-alkylacrylamide units in the copolymers. W-s linearly increased with Delta gamma for copolymers with NEA and those with lower contents of NHA and NOA which do not form intramolecular hydrophobic microdomains, whereas copolymers of NDA and those with higher contents of NHA and NOA, which form the microdomains, exhibited large W-s but asmall increase with Delta gamma. W-s were lower and also slightly increased with Delta(g)amma for polymers of DMA, N-acryloylpyrrolidine (APR) and N-isopropylacrylamide (IPA). It was deduced that the adsorptions of polymers and copolymers used here al air-water and PS particle-water interfaces are mainly governed by their overall hydrophobicity and that of their alkyl groups of n-alkylacrylamide units, respectively.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:49:19