Authors: Sosale Chandrasekhar
Macromolecular aggregation and mechanical strength characterize polymer behavior, but apparently remain enigmatic: small molecules prefer to be solvated but macromolecules prefer to aggregate. This is a consequence of the enormous loss of solvent entropy attending macromolecular solvation. The additivity of weak (e.g., van der Waals) forces in a macromolecule cannot explain aggregation, as the accompanying entropy loss would also be additive. However, even this would be overshadowed by the loss of solvent entropy in the case of its solvation. A thermodynamic basis for the aggregation, however, needs a reassessment of the van der Waals equation of state, a reinterpretation of the coefficient ‘a’ suggesting that the van der Waals force may be stronger (~15 kcal mol--1) than believed. Its manifestation is normally thwarted by the dominance of entropic effects in the weak interactions. The phenomenal mechanical properties of polymers are explicable by the above reassessment of current ideas.
Comments: 18 Pages.
[v1] 2012-10-19 02:55:41
Unique-IP document downloads: 344 times
Vixra.org is a pre-print repository rather than a journal. Articles hosted may not yet have been verified by peer-review and should be treated as preliminary. In particular, anything that appears to include financial or legal advice or proposed medical treatments should be treated with due caution. Vixra.org will not be responsible for any consequences of actions that result from any form of use of any documents on this website.
Add your own feedback and questions here:
You are equally welcome to be positive or negative about any paper but please be polite. If you are being critical you must mention at least one specific error, otherwise your comment will be deleted as unhelpful.