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Titolo:
MELT MISCIBILITY IN BLENDS OF POLYPROPYLENE, CK-POLY(ETHYLENE-STAT-BUTYLENE)-BLOCK-POLYSTYRENE, AND PROCESSING OIL FROM MELTING-POINT DEPRESSION
Autore:
OHLSSON B; TORNELL B;
Indirizzi:
LUND INST TECHNOL,CTR CHEM,DEPT CHEM ENGN 2 S-22100 LUND SWEDEN LUND INST TECHNOL,CTR CHEM,DEPT CHEM ENGN 2 S-22100 LUND SWEDEN
Titolo Testata:
Polymer engineering and science
fascicolo: 11, volume: 36, anno: 1996,
pagine: 1547 - 1556
SICI:
0032-3888(1996)36:11<1547:MMIBOP>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLY(ETHYLENE OXIDE) BLENDS; ISOTACTIC POLYPROPYLENE; POLYMER BLENDS; BEHAVIOR; CRYSTALLIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
B. Ohlsson e B. Tornell, "MELT MISCIBILITY IN BLENDS OF POLYPROPYLENE, CK-POLY(ETHYLENE-STAT-BUTYLENE)-BLOCK-POLYSTYRENE, AND PROCESSING OIL FROM MELTING-POINT DEPRESSION", Polymer engineering and science, 36(11), 1996, pp. 1547-1556

Abstract

The miscibility of isotactic polypropylene (PP) in blends with (a) ock-poly(ethylene-stat-butylene)-block-polystyrene (SEBS) and processingoil, (b) poly(ethylene-co-propylene) (EPM), and (c) EPM and processing oil, has been studied using the method of melting-point depression. Near equilibrium melting temperatures were determined by applying the Hoffman-Weeks method to PP melting temperatures determined by DSC on samples crystallized isothermally for 20 h at 80, 100, 120 and 140 degrees C. A large melting point depression was observed for PP in blends with SEES and processing oil, suggesting that PP was soluble in the molten blends. On melting, the turbidity of the PP/SEBS/Oil blends increased, suggesting that the equilibrium melt contains two liquid phases. For PP in blends with EPM or EPM and processing oil, a melting-point depression was not observed. The results indicate why PP/SEBS/Oil blends, within a wide composition range, formed bicontinuous interpenetrating network structures on cooling from the melt, whereas all of the blends with EPM formed solid blends with one continuous phase and one dispersed phase.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 17:04:13