✦ LIBER ✦

Returning to Basics: Direct Integration of the Full Molecular-Weight Distribution Equations in Addition Polymerization

✍ Scribed by Enrique Saldívar-Guerra; Ramiro Infante-Martínez; Eduardo Vivaldo-Lima; Antonio Flores-Tlacuahuac

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 457 KB
Volume: 19
Category: Article
ISSN: 1022-1344
DOI: 10.1002/mats.200900072

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Direct integration of the equations describing the full MWD in addition polymerization is shown to be feasible in reasonable computing times using standard computers for a considerable number of realistic systems. This is possible if the stiffness of the system is removed (if present) by the application of the QSSA, and the use of suitable numerical methods. This communication provides the basic ideas of a general method, based on the chemical nature of the system and the structure of the MWD equations. The application of the method provides additional insight on the dynamics and the underlying chemistry of the system. Examples of free radical polymerizations including controlled radical polymerization are offered, which can be solved in less than an hour on a PC.
magnified image

📜 SIMILAR VOLUMES

Full Molecular Weight Distribution in RA

Full Molecular Weight Distribution in RAFT Polymerization. New Mechanistic Insight by Direct Integration of the Equations

✍ Iván Zapata-González; Enrique Saldívar-Guerra; José Ortiz-Cisneros 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 968 KB

## Abstract The full molecular weight distribution (FMWD) equations in RAFT polymerization are solved by direct integration for three models: intermediate radical termination (IRT), slow fragmentation (SF), and IRT with oligomers (IRTO). It is shown that the quasi steady state approximation (QSSA)