Aminopropyl-terminated poly(dimethylsiloxane) (ATPS) with different molecul
ar weights was prepared by base-catalyzed equilibration of octamethylcyclot
etrasiloxane and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane with
different ratios. Their number-average molecular weights (M-n) were determi
ned by end-group analysis, and intrinsic viscosity([eta]) in toluene was me
asured with a Ubbelohde viscometer. A relationship between M-n and [eta] wa
s obtained for ATPS. For 1.0 x 10(4) < M-n < 6.0 x 10(4), it was in accord
with [eta](toluene,25 degreesC) = 5.26 X 10(-2) M-n(0.587). (C) 2001 John W
iley & Sons, Inc.