Synthetic versus biological networksThe Wiley Polymer Networks Group Review Series Volume 2 Synthetic versus Biological Networks Edited by B. T. Stokke and A. Elgsaeter The Norwegian University of Science and Technology, Trondheim, Norway This, the second volume in the series, presents articles from the 14th Polymer Networks Group conference which took place in Norway in July 1998 The focus of the conference was 'Synthetic versus Biological Networks' with papers highlighting the different ideas emerging from investigations into synthetic polymer networks as opposed to, and in comparison with, polymer networks of biological origins. The papers published in this volume have been divided into six sections: Network Formation Network Characterization Polymer Networks and Precursor Architectures Biopolymer Networks and Gels Biomedical Applications of Polymer Networks Polymer Networks in Restricted Geometries |
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Page 294
COLLECTIVE PROPERTIES In conventional polymer systems made up of long
flexible chain molecules the viscoelastic response is entropic in origin over a
wide range of frequencies [46]. For semiflexible polymers a complete
understanding of the viscoelastic response is complicated by several factors. First
of all, there are several ways by which forces can be transmitted in a network.
This can either happen by steric (or solvent-mediated) interactions between the
filaments or by ...
COLLECTIVE PROPERTIES In conventional polymer systems made up of long
flexible chain molecules the viscoelastic response is entropic in origin over a
wide range of frequencies [46]. For semiflexible polymers a complete
understanding of the viscoelastic response is complicated by several factors. First
of all, there are several ways by which forces can be transmitted in a network.
This can either happen by steric (or solvent-mediated) interactions between the
filaments or by ...
Page 340
Whatever the interpretation of SANS results, they demonstrate that the structure
of BSA heat-set gels formed at pH 7 differs completely from that obtained at the
isoelectric pH in absence of added salt. But the rheological behaviours of the two
types of gels show great similarity. This is illustrated first on Figure 26.10, which
compares the viscoelastic response over the 10-3- 10 Hz frequency range of gels
formed in different solvent conditions at about the same protein concentration.
Whatever the interpretation of SANS results, they demonstrate that the structure
of BSA heat-set gels formed at pH 7 differs completely from that obtained at the
isoelectric pH in absence of added salt. But the rheological behaviours of the two
types of gels show great similarity. This is illustrated first on Figure 26.10, which
compares the viscoelastic response over the 10-3- 10 Hz frequency range of gels
formed in different solvent conditions at about the same protein concentration.
Page 368
Of course other bounds are calculable, but this view reopens the question as to
whether gelatin is a viscoelastic solid or a viscoelastic liquid. GELATINS FROM
ALTERNATIVE SOURCES Most of the commercial gelatins available are derived
from mammalian, and particularly bovine, sources. From the food industry
viewpoint, recent UK problems with BSE have proved problematic, and there is a
preference expressed for a move away from bovine gelatins. These generally
have a ...
Of course other bounds are calculable, but this view reopens the question as to
whether gelatin is a viscoelastic solid or a viscoelastic liquid. GELATINS FROM
ALTERNATIVE SOURCES Most of the commercial gelatins available are derived
from mammalian, and particularly bovine, sources. From the food industry
viewpoint, recent UK problems with BSE have proved problematic, and there is a
preference expressed for a move away from bovine gelatins. These generally
have a ...
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Contents
Modelling of Network Polymerization with Intramolecular | 15 |
Primary Cyclization Reactions in Crosslinked Polymers | 27 |
Networks Monte Carlo Simulations for Coatings Research | 39 |
Copyright | |
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1999 John Wiley amphiphilic APCNs B.T. Stokke behavior birefringence calculated cell chains Chem chemical concentration conetworks copolymers counter ions crosslinking curing curves cyclization decrease deformation dendrimer dependence deswollen diacetylene diffusion diol distribution double bond dynamic dynamic light scattering Edited by B.T. effect elastic Elgsaeter end-groups equation experimental formation formed function functional groups gel point gelatin gelation Group Review Series hydrogel hydrogel tube hyperbranched increase inhomogeneities kinetics light scattering linear Macromolecules macromonomer materials measurements mechanical method modulus molecular weight molecules monomer network structure Networks Group Review NIPAAm obtained osmotic parameters particles pendant phase separation Phys PNIPA polyelectrolyte polyester Polymer Networks Group polymerization polyurethane prepared properties PVA hydrogel QSPR ratio reacted reaction reactive Review Series Vol rheological Sakyo-ku sample scattered intensity shear rate shown in Figure solvent Stokke swollen temperature transition values viscoelastic viscosity weight fraction Wiley Polymer Networks
Bibliographic information
| Title | Synthetic versus biological networks Volume 2 of Wiley Polymer Networks Group review series |
| Author | A. Elgsaeter |
| Editors | B. T. Stokke, A. Elgsaeter |
| Edition | 2, illustrated |
| Publisher | Wiley, 2000 |
| Original from | the University of Michigan |
| Digitized | 26 Nov 2007 |
| ISBN | 0471987131, 9780471987130 |
| Length | 500 pages |
| Subjects | › › Polymer networks Science / Chemistry / Organic Science / Physics / Polymer Technology & Engineering / Chemical & Biochemical |
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