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Pathway to copolymer collapse in dilute solution: Uniform versus random distribution of comonomers

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Title Pathway to copolymer collapse in dilute solution: Uniform versus random distribution of comonomers
 
Creator DASMAHAPATRA, AK
NANAVATI, H
KUMARASWAMY, G
 
Subject chain collapse
protein chains
transition
polymer
macromolecules
heteropolymers
nanoparticles
conformation
simulations
principles
 
Description Monte Carlo simulations show that copolymers with uniformly (or periodically) distributed sticky comonomers collapse "cooperatively," abruptly forming a compact intermediate comprising a monomer shell surrounding a core of the aggregated comonomers. In comparison, random copolymers collapse through a relatively less-compact intermediate comprising a comonomer core surrounded by a fluffy monomer shell that densifies over a wide temperature range. This difference between the collapse pathways for random and uniform copolymers persists to higher chain lengths, where uniform copolymers tend to form multiple comonomer cores. In this paper, we describe the formation of such an intermediate state, and the subsequent collapse, by recognizing that these arise from the expected balance between comonomer aggregation enthalpy and loop formation entropy dictated by the chain microstructure. (c) 2007
 
Publisher AMER INST PHYSICS
 
Date 2011-07-16T11:29:13Z
2011-12-26T12:49:44Z
2011-12-27T05:35:23Z
2011-07-16T11:29:13Z
2011-12-26T12:49:44Z
2011-12-27T05:35:23Z
2007
 
Type Article
 
Identifier JOURNAL OF CHEMICAL PHYSICS, 127(23), -
0021-9606
http://dx.doi.org/10.1063/1.2802296
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4415
http://hdl.handle.net/10054/4415
 
Language en