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Improved Kinetic Rate Constants for Nylon 6, Nylon 6,6, and Nylon 6/6,6 Copolymer
Author(s) -
Liu Fei F.,
McAuley Kim B.
Publication year - 2020
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201900037
Subject(s) - copolymer , nylon 6 , materials science , kinetics , nylon 66 , polymer chemistry , thermodynamics , kinetic energy , reaction rate constant , polymer , composite material , physics , polyamide , quantum mechanics
Abstract Nylon 6 and 6,6 literature data are collected over a wide range of water concentrations and temperatures (0 ≤ [ W ] 0 ≤ 40.8 wt%, 200 ≤ T ≤300 °C) and used to fit parameters in an updated batch reactor model. The resulting copolymerization model uses side reactions to account for the complex influence of water on kinetics and reaction equilibria. The proposed parameter estimates result in a significant improvement in the fit to the data, corresponding to a 73% reduction in the weighted‐least‐squares objective function compared to when the parameters of Arai et al. are used. Copolymerization simulations are conducted at industrially relevant conditions, shedding light on the complex influence of water and on the potential to include waste nylon 6 cyclic dimer in the feedstock. The model and parameter estimates will be helpful in future models of nylon 6/6,6 copolymerization in continuous reactor systems.