Kinetic Reaction Analysis of Gelation: Investigations of Random Step-Growth and Chain-Initiated Resins
| Autor: | D. C. Timm, and Q. Zhu, D. J. Robbins |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Chemistry
General Chemical Engineering Intermolecular force Thermodynamics Thermosetting polymer General Chemistry Epoxy Industrial and Manufacturing Engineering Distribution (mathematics) Chain (algebraic topology) Rubber elasticity visual_art Intramolecular force Polymer chemistry visual_art.visual_art_medium Molecule |
| Zdroj: | Industrial & Engineering Chemistry Research. 36:1360-1372 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/ie960461m |
| Popis: | Subject to intermolecular addition and intramolecular cross-linking reactions, deterministic models which describe chain infrastructure for a random A4 + B2 resin and a Poisson-type, chain-initiated epoxy anhydride thermoset were derived. Sol fractions are described in terms of molar concentrations of molecules of a given chemical composition and conversion and in terms of branch node distributions. Moments of the population density distribution form conditionally convergent series. Two limits were selected. Their difference is proportional to the substance in the gel. Purely deterministic derivations are made regarding the internal structure of the gel-structural parameters related to rubber elasticity, for example, which have been previously held to be obtainable only by statistical arguments. Numerical solutions are presented graphically to emphasize the distinct molecular structure within the two resins and the consequence with regards to mechanical performance. Deterministic solutions are equal to so... |
| Databáze: | OpenAIRE |
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