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Titolo: Dilution wave and negative-order crystallization kinetics of chain molecules
Autore: Ungar, G; Mandal, PK; Higgs, PG; de Silva, DSM; Boda, E; Chen, CM;
- Indirizzi:
- Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England UnivSheffield Sheffield S Yorkshire England S1 3JD S Yorkshire, England Univ Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, England Univ Manchester Manchester Lancs England M13 9PT M13 9PT, Lancs, England
- Titolo Testata:
- PHYSICAL REVIEW LETTERS
fascicolo: 20,
volume: 85,
anno: 2000,
pagine: 4397 - 4400
- SICI:
- 0031-9007(20001113)85:20<4397:DWANCK>2.0.ZU;2-0
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- POLYETHYLENE SINGLE-CRYSTALS; POLYMER CRYSTALS; GROWTH-KINETICS; NORMAL-PARAFFINS; RATES; TEMPERATURE; LENGTHS; ALKANES; ONSET;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- --discip_EC--
- Citazioni:
- 32
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Ungar, G Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England Univ Sheffield Sheffield S Yorkshire England S1 3JD ire, England
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- Citazione:
- G. Ungar et al., "Dilution wave and negative-order crystallization kinetics of chain molecules", PHYS REV L, 85(20), 2000, pp. 4397-4400
Abstract
We show that the crystal growth rate of a very long-chain n-alkane C198H398 from solution can decrease with increasing supersaturation and follow strongly negative order kinetics. The experimental behavior can be well represented by a theoretical model which allows the molecule to attach and detachas either extended or folded in two. The obstruction of extended-chain growth by unstable folded depositions increases disproportionately with increasing concentration. As a consequence of this abnormal kinetics, a "dilutionwave" can propagate and trigger a folded-to-extended-chain transformation on its way.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/21 alle ore 12:53:57