Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 120, Issue 27, Pages 6754-6760Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.6b01757
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Funding
- National Natural Science Foundation of China [21274061, 21474050]
- Program for Changjiang Scholars and Innovative Research Team
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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We performed dynamic Monte Carlo simulations of half-half binary blends of symmetric (double and mutual) crystallizable polymers. We separately enhanced the driving forces for polymer-uniform and polymer staggered crystals. Under parallel enhancements, polymer-uniform crystals exhibit faster nucleation and growth, with more chain folding and less lamellar thickening, than those in polymer-staggered crystals. We attributed the results to intramolecular crystal nucleation, ruined by enhanced polymer-staggered crystallization. Our observations provide direct molecular-level evidence to support the fact that intramolecular crystal nucleation is favored by polymer crystallization in quiescent solutions and melt, which yields chain folding for the characteristic beta-sheet or lamellar morphology of macromolecular crystals.
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