Interfacial phenomena in macromolecular systems

Rastogi, Anil K.; Pierre, L. E. St.

doi:10.1016/0021-9797(69)90323-3

Cited by 92 publications

(40 citation statements)

References 14 publications

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“…From eq Al and A2, it follows that, By multiplying both sides of eq A3 by cos 2 Apparently from Figure 8, Substituting eq A9 in eq AlO, we finally obtain, …”

Section: The Derivation Of F3mentioning

confidence: 99%

“…Studies on membrane surfaces, i.e., polymer-air interfaces, of the A-B type and A-B-A type block copolymers have been developed by Litt, 1 Rastogi, 2 Owen, 3 Vanzo, 4 Brash, 5 Clark, 6 O'Malley, 7 and Merrill 8 using surface free energy, contact angle, replication electron micrograph, Fourier transform IR internal reflection spectroscopy, and X-ray photoelectron spectroscopy (XPS) techniques. XPS has been applied to analyzing polymer surfaces by Clark et a/.…”

mentioning

confidence: 99%

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Studies on Membrane Surfaces of A-B-A Tri-Block Copolymers Consisting of Poly(ε-N-benzyloxycarbonyl-L-lysine) as the A Component and Polybutadiene as the B Component

Kugo

Hata

Hayashi

et al. 1982

Polym J

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ABSTRACT:The surface characteristics of A-B-A type tri-block copolymer membranes consisting of a-helical poly(e-N-benzyloxycarbonyl-L-lysine) as the A component and polybutadiene as the B component were investigated by X-ray photoelectron spectroscopy (XPS), replication electron micrograph, and wettability measurement. The XPS measurements showed the copolymer composition of the outermost surface to be quite different from the bulk composition. It was found by replication electron micrograph that the block copolymer surface is not even, i.e., the polybutadiene domains are elevated above the polypeptide matrix. The results of contact angle measurements indicated the existence of an interfacial region between the a-helical A component and the B component at the surfaces of the block copolymer membranes.KEY WORDS Tri-Block Copolymer I Poly(e-N-benzyloxycarbonyl-L-lysine

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“…From eq Al and A2, it follows that, By multiplying both sides of eq A3 by cos 2 Apparently from Figure 8, Substituting eq A9 in eq AlO, we finally obtain, …”

Section: The Derivation Of F3mentioning

confidence: 99%

mentioning

confidence: 99%

Studies on Membrane Surfaces of A-B-A Tri-Block Copolymers Consisting of Poly(ε-N-benzyloxycarbonyl-L-lysine) as the A Component and Polybutadiene as the B Component

Kugo

Hata

Hayashi

et al. 1982

Polym J

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“…Fluorine-containing graft copolymers were synthesized, and their surface properties were investigated. 11,[15][16][17] However, block copolymers containing both fluorine and silicone have not been investigated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of block copolymers having perfluoroalkyl and silicone-containing side chains using diazo macroinitiator and their surface properties

Kim

Lee

Doh

et al. 1999

J. Appl. Polym. Sci.

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ABSTRACT:The fluorosilicone block copolymers of poly(perfluoroalkylethyl acrylate)-bpoly(3-[tris(trimethylsilyloxy)silyl] propyl methacrylates) (PFA-b-PSiMAs) having perfluoroalkyl and silicone-containing side chains were obtained by three-step synthetic approaches. In the first step, hydroxyl-terminated poly(perfluoroalkylethyl acrylate) macromonomer (PFAM) was prepared by the free-radical polymerization of perfluoroalkylethyl acrylate and 2-mercaptoethanol. In the second step, PFAM initiator (PFAMI) was prepared from the condensation reaction of the hydroxyl-terminated PFAM and 4,4Ј-azobis-4-cyanopentanoic acid chloride (ACPC). ACPC was obtained from the reaction of 4,4Ј-azobis-4-cyanopentanoic acid and phosphorus pentachloride. In the third step, PFA-b-PSiMAs (BPFSs) were synthesized from the reaction of PFAMI macroinimer and SiMA. Fourier transform infrared spectroscopy and 1 H-NMR analyses verified that the syntheses of ACPC, hydroxyl-terminated PFAM, PFAMI, and BPFS were completed successfully. The intrinsic surface energies of BPFSs and their surface modification effects on poly(vinyl chloride) film were investigated by analyzing the surface free energies and atomic compositions of the outermost layer of the surfaces. BPFSs exhibit extremely low surface free energies of about 9.7-13.0 dynes/cm. It was confirmed that BPFS, having extremely low surface free energy, is preferentially enriched at the outermost layer of the surface of BPFS/poly(vinyl chloride) blend.

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“…Early studies of the surface tensions of block copolymer melts 7 , 8 illustrated significant surface activity by the sequence of lower surface energy. Surface activity increased with block length, and complete surface coverage by the low surface energy constituent was observed for copolymers of sufficient length.…”

Section: Introductionmentioning

confidence: 99%

“…9 - 15 Surface enrichment has also been demonstrated in random copolymers of hexamethyl sebacate with dimethyl siloxane and ethylene oxide with propylene oxide. 7 Complete domination of the surface by lower energy constituent does not occur however, reflecting the influence of configurational constraints which limit migration to the surface.…”

Section: Introductionmentioning

confidence: 99%

Preferential Surface Adsorption in Miscible Blends of Polystyrene and Poly(vinyl methyl ether).

Bhatia¹,

Pan²,

Koberstein³

1988

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Interfacial phenomena in macromolecular systems

Cited by 92 publications

References 14 publications

Studies on Membrane Surfaces of A-B-A Tri-Block Copolymers Consisting of Poly(ε-N-benzyloxycarbonyl-L-lysine) as the A Component and Polybutadiene as the B Component

Studies on Membrane Surfaces of A-B-A Tri-Block Copolymers Consisting of Poly(ε-N-benzyloxycarbonyl-L-lysine) as the A Component and Polybutadiene as the B Component

Synthesis of block copolymers having perfluoroalkyl and silicone-containing side chains using diazo macroinitiator and their surface properties

Preferential Surface Adsorption in Miscible Blends of Polystyrene and Poly(vinyl methyl ether).

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