منابع مشابه
Melting kinetics in polymers.
In polymers, it is possible to obtain single chain forming single crystals. It is feasible to melt these crystals by simple consecutive detachment of chain segments from the crystalline substrate and its diffusion into the melt. However, complication in the melting process occurs when the chain in the process of detachment from the surface is shared between different crystals. Experimentally, a...
متن کاملContinuous melting of compact polymers.
The competition between chain entropy and bending rigidity in compact polymers can be addressed within a lattice model introduced by Flory in 1956 [Proc. R. Soc. London A 234, 60 (1956)]]. It exhibits a transition between an entropy dominated disordered phase and an energetically favored crystalline phase. The nature of this order-disorder transition has been debated ever since the introduction...
متن کاملPrediction of melting points of a diverse chemical set using fuzzy regression tree
The classification and regression trees (CART) possess the advantage of being able to handlelarge data sets and yield readily interpretable models. In spite to these advantages, they are alsorecognized as highly unstable classifiers with respect to minor perturbations in the training data.In the other words methods present high variance. Fuzzy logic brings in an improvement in theseaspects due ...
متن کاملMolecular dynamics study of the effect of alkyl chain length on melting points of [CnMIM][PF6] ionic liquids.
Based on molecular dynamics simulations, the melting points Tm of a series of 1-alkyl-3-methylimidazolium hexafluorophosphate ionic liquids [CnMIM][PF6] with n = 2, 4, 10, 12, and 14 were studied using the free energy-based pseudosupercritical path (PSCP) method. The experimental trend that the Tm decreases with increasing alkyl chain length for ILs with short alkyl chains and increases for the...
متن کاملNew Aspects on Melting and Annealing Behaviour of Polymers
Poly( 1-butene) (PB) crystallizes from the melt in a metastable modification II (mod. II) which slowly transforms into the stable modification I (mod. I). X-ray wide angle (WAXS) measure ments show that in mod. I the size of the microparacrystallites (mPC’s) in chain direction, Z>oi2 * the polydispersity gj> of the size distribution in this direction, the lateral size D u o and the paracrystal...
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ژورنال
عنوان ژورنال: Journal of Polymer Science Part B: Polymer Physics
سال: 1996
ISSN: 0887-6266,1099-0488
DOI: 10.1002/polb.1996.900