منابع مشابه
Formation and Structure of Polyacrylamide Gels
Acrylamide and N,N-methylenebis(acry1amide) (AAm-Bis) copolymerization has been investigated in water at a monomer concentration of 1.8 w/v %. Conversion of monomer and pendant vinyl groups was measured as a function of the reaction time up to the onset of macrogelation. Experimental results indicate that 80% of pendant vinyl groups are consumed by cyclization reactions. When the monomer concen...
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Transport across the membranes of polymersomes remains difficult in part due to the great thickness of the polymer bilayers. Here, we report that dynamic polyion-counterion transport systems are active in fluorogenic polymersomes composed of poly(dimethylsiloxane)-b-poly(2-methyloxazoline) (PDMS-PMOXA). These results suggest that counterion-activated calf-thymus DNA can act as cation carrier th...
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the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...
15 صفحه اولFormation of creases on the surfaces of elastomers and gels
When a block of an elastomer is bent, the compressed surface may form a crease. The critical strain for creasing measured experimentally is known to disagree with that predicted by linear perturbation analysis. This paper calculates the critical strain by comparing the elastic energy in a creased body and that in a smooth body. This difference in energy is expressed by a scaling relation. Criti...
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2014 Pairwise bonding between polymers in solution may lead to network formation e.g. double helical junction zones in biopolymer gels, or association between polyacids and polybases. The equilibrium length distribution of bonded sequences to be expected in a branched network structure is obtained here by modification of helix-coil transition theory for linear chains. In the limit of infinite c...
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ژورنال
عنوان ژورنال: Sen'i Gakkaishi
سال: 1993
ISSN: 0037-9875,1884-2259
DOI: 10.2115/fiber.49.3_p94