Colloidal and Morphological Behavior of Block and Graft by M. Matsuo, S. Sagaye (auth.), Gunther E. Molau (eds.) PDF

By M. Matsuo, S. Sagaye (auth.), Gunther E. Molau (eds.)

ISBN-10: 1468419080

ISBN-13: 9781468419085

ISBN-10: 1468419102

ISBN-13: 9781468419108

The molecules of block and graft copolymers are molecules of a better order; they include homopolymer subchains that are interconnected by means of chemical valence bonds. This structural com­ plexity is manifested within the strange habit of block and graft copolymers either in resolution and in bulk. many varieties of interac­ tions are attainable in block and graft copolymers within the stable kingdom. Polymer subchains of 1 molecule can have interaction with different polymer subchains that could belong to a similar molecule or to diversified molecules. for the reason that polymer chains of chemically diversified composition tend to be incompatible, thermodynamically damaging in addition to thermodynamically favorable interactions exist within the stable country. In suggestions of block and graft copolymers, the take a seat­ uation turns into much more complicated, simply because interactions among the solvent molecules and some of the subchains of the copolymer mole­ cules take place as well as the interactions among the polymer chains. This multitude of interactions supplies upward push to a large spec­ trum of colloidal and morphological homes that have no paral­ lel in much less complicated polymer structures resembling homopolymers or random copolymers. learn at the colloidal and morphological habit of block and graft copolymers is a comparatively new box of exercise. It all started in 1954, whilst F. M. Merrett fractionated combos of grafted na­ tural rubber with the corresponding homopolymers and saw that colloidal sols have been shaped at yes issues in the course of his fractional precipitations.

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The molecules of block and graft copolymers are molecules of a better order; they include homopolymer subchains that are interconnected by means of chemical valence bonds. This structural com­ plexity is manifested within the strange habit of block and graft copolymers either in resolution and in bulk. many sorts of interac­ tions are attainable in block and graft copolymers within the strong kingdom.

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Extra info for Colloidal and Morphological Behavior of Block and Graft Copolymers: Proceedings of an American Chemical Society Symposium held at Chicago, Illinois, September 13–18, 1970

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Cromolecules, b 260 (1968). 'L 38 (1967). LIGHT SCATTERING FROM TWO-PHASE POLYMER SYSTEM HAVING SPHERICAL DOMAIN STRUCTURE M. Moritani * , T. Inoue, M. Motegi ** , and H. Kawai, Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan, and K. Kato, Development Research Laboratories, Toray Co. , Ohtsu, Shiga-ken, Japan INTRODUCTION The heterogeneity in the structure of polymer solids greatly influences the bulk properties, and the light scattering may be a useful technique for quantifying the heterogeneity of the colloidal dimension.

Inoue, M. Motegi ** , and H. Kawai, Department of Polymer Chemistry, Faculty of Engineering, Kyoto University, Kyoto, Japan, and K. Kato, Development Research Laboratories, Toray Co. , Ohtsu, Shiga-ken, Japan INTRODUCTION The heterogeneity in the structure of polymer solids greatly influences the bulk properties, and the light scattering may be a useful technique for quantifying the heterogeneity of the colloidal dimension. The theoretical studies of the light scattering from solid materials were first carried out by Debye and Bueche (1) for isotropic but inhomogeneous system, made more general by Goldstein and Michalik (2), and further extended by Stein and his co-workers (3-6) to the anisotropic system of crystalline polymers.

El) Extention ratio em) Fig. 6. Schematic diagrams showing the typical change of light scattering patterns from the film specimens with extension ratio. DEFORMATION MECHANISM OF ELASTOMERIC BLOCK COPOLYMERS 55 The circularly symmetric pattern at the unelongated state of each specimen (A-type pattern in Fig. 6) is ascribed t~ the density fluctuation due to the two-phase structure itself. More strictly speaking, it must be arised from the long-range correlation of the spherical domains dispersed in the matrix (15).

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Colloidal and Morphological Behavior of Block and Graft Copolymers: Proceedings of an American Chemical Society Symposium held at Chicago, Illinois, September 13–18, 1970 by M. Matsuo, S. Sagaye (auth.), Gunther E. Molau (eds.)


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