On the contraction factors of long-chain branched macromolecules

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F14%3A00424181" target="_blank" >RIV/61389013:_____/14:00424181 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.eurpolymj.2013.11.010" target="_blank" >http://dx.doi.org/10.1016/j.eurpolymj.2013.11.010</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.eurpolymj.2013.11.010" target="_blank" >10.1016/j.eurpolymj.2013.11.010</a>

Result language
angličtina
Original language name
On the contraction factors of long-chain branched macromolecules
Original language description
For several decades, the relation between the contraction factor of radius of gyration for branched macromolecules, g, and that of intrinsic viscosity, g, has been presented as g = g?. The value of ? was assumed to be constant for branched macromoleculesof a certain type, such as stars, or combs, or statistically branched macromolecules. Experimentally determined values of ?, however, turn out in the majority of cases to be molecular-weight dependent. The present study shows that molecular-weight-independent values of ? can be expected only for a plurality of molecules with identical architecture. By branched molecules with identical architecture we mean molecules in which with varying degree of polymerization the ratios of the degrees of polymerization of all sub-chains remain constant, irrespective of the integral degree of polymerization of individual molecules. Also, it has been demonstrated that the ratio of intrinsic viscosities of a linear and a branched polymer molecule having
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Project
<a href="/en/project/GCP205%2F11%2FJ043" target="_blank" >GCP205/11/J043: Complex study of random branched amphiphilic copolymers</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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