It has been shown that the parameters in the log-normal (LN) and generalized exponential (Gex) distributions can be evaluated if molecular weight ratiosH and H,, or their equivalents, are known for a linear, unimodal homopolymer. It is suggested that better checks of observed and calculated values o
Linear combination of two-parameter functions for the molecular-weight distribution of polymers
β Scribed by E. Saiz; A. Horta
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 22 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0014-3057
No coin nor oath required. For personal study only.
β¦ Synopsis
Equations ( 16) to ( 19) in the paper with the above title [Europ. Polym. J. 9, 805 (1973)] are incorrect. They become correct if M~ + ~ is multiplied everywhere by M~,flvlz (r/= E, L or N; same meanings for symbols as before). This correction modifies slightly the coefficients and mean quadratic deviation(2) of method A, and also M~+ l of method B. The co___rrect values of 2 (method A) and M,+ I (method B) for polymers R2, R 1 and R3, are: 2 x l0 a = 0-50, 0-85, 0"58; M~+ t Γ 10-5 = 1-70, 2.20, 3.61, respectively. The advantages of the linear combination are little changed by these new values.
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