Nucleation effects in high polymers
نویسندگان
چکیده
منابع مشابه
Polarons as nucleation droplets in nondegenerate polymers.
We present a study of the nucleation mechanism that allows the decay of the metastable phase (trans-cisoid) to the stable phase (cis-transoid) in quasi one-dimensional non-degenerate polymers within the continuum electronphonon model. The electron-phonon configurations that lead to the decay, i.e. the critical droplets (or transition state), are identified as polarons of the metastable phase. W...
متن کاملInhibition of bacterial ice nucleation by polyglycerol polymers.
The simple linear polymer polyglycerol (PGL) was found to apparently bind and inhibit the ice nucleating activity of proteins from the ice nucleating bacterium Pseudomonas syringae. PGL of molecular mass 750 Da was added to a solution consisting of 1 ppm freeze-dried P. syringae 31A in water. Differential ice nucleator spectra were determined by measuring the distribution of freezing temperatur...
متن کاملNonperturbative effects on nucleation.
A nonperturbative correction to the thermal nucleation rate of critical bubbles in a first-order phase transition is estimated. Using a simple model of a scalar field in a double-well potential, we obtain a corrected potential which incorporates the free-energy density available from large-amplitude fluctuations, which is not included in the usual perturbative calculation. As an application of ...
متن کاملDirected polymers in high dimensions.
We study directed polymers subject to a quenched random potential in d transversal dimensions. This system is closely related to the Kardar–Parisi– Zhang equation of nonlinear stochastic growth. By a careful analysis of the perturbation theory we show that physical quantities develop singular behavior for d → 4. For example, the universal finite size amplitude of the free energy at the rougheni...
متن کاملEFFECTS OFVARIOUS NUCLEATION AGENTS ON CRYSTALLIZATION KINETIC OFLAS GLASS CERAMIC
The effect of Y2O3, CeO2, P2O5, ZrO2 and TiO2 in single, double and triple form on crystallization mechanism of Li2OAl2O3- SiO2(LAS) glass-ceramic system was investigated .The nucleation and crystallization peak temperatures of optimized samples in each group were determined by Ray & Day method .The crystalline phase was determined by the X-ray diffractometery .The micro-structure of the sample...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Polymer Science
سال: 1959
ISSN: 0022-3832,1542-6238
DOI: 10.1002/pol.1959.1203913555