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Accurate description of intrinsic viscosity changes under polymer degradation: The schulz broad distributions
Author(s) -
Shyichuk A. V.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960801)61:5<725::aid-app1>3.0.co;2-q
Subject(s) - dispersity , intrinsic viscosity , thermodynamics , viscosity , polymer , degradation (telecommunications) , molar mass distribution , polymer degradation , materials science , degree (music) , chemistry , polymer chemistry , physics , composite material , engineering , telecommunications , acoustics
For the Schulz broad distributions with initial weight‐polydispersity from 2 to 10, the correlation between the intrinsic viscosity and the degradation degree, DD = In( M no / M n ), has been found as the following equation system:\documentclass {article}\pagestyle{empty}\begin{document}$ ln[\eta ] = ln[\eta ]_0 - \alpha (lnP_0 - lnP + DD);P = P_F + (P_0 - P_F ) \times \exp ((S_0 - 1.43)\\(\exp ( - S \times DD) - 1)/SS - 1.43 \times DD);S_0 = 0.33 + 0.557 \times P_{w_0 } ;\\SS = 1.962 + 0.9428 \times In(P_{w_0 } - 1) $\end{document} . Here P 0 , P , and P F are viscosit‐olydispersities: initial, current, and that of the Flory distribution, respectively. This correlation inaccuracy has been assessed to be about 2%. © 1996 John Wiley & Sons, Inc.