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Viscosity–molecular weight relationship for aminopropyl‐terminated poly(dimethylsiloxane)
Author(s) -
Wu Yongzhong,
Feng Shengyu
Publication year - 2001
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/app.1179
Subject(s) - octamethylcyclotetrasiloxane , intrinsic viscosity , viscometer , toluene , ubbelohde viscometer , viscosity , polymer chemistry , molecular mass , base (topology) , molar mass distribution , materials science , chemistry , analytical chemistry (journal) , polymer , organic chemistry , composite material , mathematics , mathematical analysis , enzyme
Aminopropyl‐terminated poly(dimethylsiloxane) (ATPS) with different molecular weights was prepared by base‐catalyzed equilibration of octamethylcyclotetrasiloxane and 1,3‐bis(3‐aminopropyl)‐1,1,3,3‐tetramethyldisiloxane with different ratios. Their number‐average molecular weights ( M n ) were determined by end–group analysis, and intrinsic viscosity ([η]) in toluene was measured with a Ubbelohde viscometer. A relationship between M n and [η] was obtained for ATPS. For 1.0 × 10 4 < M n < 6.0 × 10 4 , it was in accord with [η] toluene,25°C = 5.26 × 10 −2 M n 0.587 . © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 975–978, 2001
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