Response to comments by Asua

Polymer Vol. 39 No. 10, p. 2063, 1998 1998 Elscvier Science Lld Printed in Great Britain. All rights reserved 0032-3861 98,'$19.00 + 0.00

PII: S0032-3861(97)00433-3

ELSEVIER

Reply Response t o c o m m e n t s by Asua The comment on the use of N,. instead of No is appropriate. This use of N,. is given in the Appendix of the original paper ~. Nevertheless all the results in the original paper still stand as shown in Figure 1. As shown in the figure, there is practically no difference between the two cases except for the re-entry, which shows a slight difference in the region of low initiator concentration. Equation (17) in the comments had already been mentioned in the original paper as being similar to that by Asua et al. 2 There is a misunderstanding on the part of Dr Asua with regard to the point (iv). It is shown in the original paper (the paragraph below eqn (24)) that the re-entry rate of long chain hydrophobic species from the aqueous phase is negligible.

1E+O

7

o 1E-1

t

Exit

0

0

o

1E-2

0

i 1E-3

!

1E-4

J

.>_ I

REFERENCES 1. 2.

IE-9

Kim, J. U. and Lee, H. H., Polymer, 1996, 37, 1941. Asua, J. M., Sudol, E. D. and EI-Aasser, M. S., Journal of Polymer Science." Part A." Polymer Chemistry, 1989, 27, 3903.

J. U. Kim and H. H. Lee Department of Chemical Engineering Seoul National University, Seoul, 151-74 2, Korea

i

1E-8

.

1E-7

.

.

.

.

.

1E-6

1E-5

IE-4

Initiator concentration (mol per ce) Figure 1 Dependence of individual rate coefficients on initiator concentration. The thin solid lines represent the rates when the formulation in the Appendix is used and the thick solid lines when the formulation in the text is used.

POLYMER Volume 39 Number 10 1998

2063