✦ LIBER ✦

Dissolution of rubbery and glassy polymers

✍ Scribed by J. S. Vrentas; C. M. Vrentas

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 123 KB
Volume: 36
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(199810)36:14<2607::aid-polb13>3.0.co;2-f

No coin nor oath required. For personal study only.

✦ Synopsis

A mathematical model is formulated for solvent dissolution of rubbery and glassy polymers. An exact solution to the problem is derived for the constant diffusivity case, and a weighted residual solution is developed for the case of a concentrationdependent diffusion coefficient. The solution is used to calculate concentration profiles, dissolution curves, dissolution half-times, and pseudointerface positions at various times.

📜 SIMILAR VOLUMES

Disentanglement and reptation during dis

Disentanglement and reptation during dissolution of rubbery polymers

✍ Balaji Narasimhan; Nikolaos A. Peppas 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 862 KB

The dissolution mechanism of rubbery polymers was analyzed by dividing the penetrant concentration field into three regimes that delineate three distinctly different transport processes. The solvent penetration into the rubbery polymer was assumed to be Fickian. The mode of mobility of the polymer c

New thermoplastic elastomers of rubbery

New thermoplastic elastomers of rubbery polyisobutylene and glassy cyclopolyisoprene segments

✍ Gabor Kaszás; Judit E. Puskás; Joseph P. Kennedy 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 999 KB

Measuring and modelling the transition l

Measuring and modelling the transition layer during the dissolution of glassy polymer films

✍ P. D. Krasicky; R. J. Groele; F. Rodriguez 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 524 KB

Integral sorption in rubbery polymers

✍ J. S. Vrentas; C. M. Vrentas 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 163 KB 👁 1 views

Simple equations are derived that describe integral sorption and desorption experiments under conditions where moving boundary effects in polymer films and spheres can be large because of high solvent concentrations. General conclusions are formulated about the nature of sorption and desorption expe

Gas transport in rubbery polymers

✍ E. Sada; H. Kumazawa; P. Xu; H. Nishikawa 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 325 KB 👁 1 views

Permeability coefficients have been measured for CO, and CH, in polyethylene membranes at 20, 30, and 40°C and at applied gas pressures up to ca. 2 MPa and for CH, in three kinds of rubber films at 25, 30, and 35OC and at applied gas pressures up to ca. 2.4 MPa. The pressure dependence of the logari

Viscoelasticity of low molecular weight

Viscoelasticity of low molecular weight polystyrene. Separation of rubbery and glassy components

✍ Tadashi Inoue; Takayuki Onogi; Ming-Long Yao; Kunihiro Osaki 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 191 KB 👁 1 views

The complex shear modulus was measured for four low molecular-weight polystyrenes (M w ϭ 10,500, 5970, 2630, and 1050) near and above the glass transition temperature. For the lowest molecular weight sample, the method of reduced variables, the time-temperature superposition principle, was applicabl