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Titolo:
BLENDS AND INTERPENETRATING POLYMER NETWORKS OF POLYPROPYLENE AND OCK-POLY(ETHYLENE-STAT-BUTYLENE)-BLOCK-POLYSTYRENE - 2 - MELT FLOW AND INJECTION-MOLDING PROPERTIES
Autore:
OHLSSON B; TORNELL B;
Indirizzi:
LUND INST TECHNOL,DEPT CHEM ENGN 2,CTR CHEM S-22100 LUND SWEDEN LUND INST TECHNOL,DEPT CHEM ENGN 2,CTR CHEM S-22100 LUND SWEDEN
Titolo Testata:
Polymer engineering and science
fascicolo: 1, volume: 38, anno: 1998,
pagine: 108 - 118
SICI:
0032-3888(1998)38:1<108:BAIPNO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLDED PARTS; KNIT-LINES; MECHANICAL-PROPERTIES; TRIBLOCK COPOLYMER; TENSILE PROPERTIES; WELD LINES; MORPHOLOGY; COMPATIBILIZATION; ALLOYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
B. Ohlsson e B. Tornell, "BLENDS AND INTERPENETRATING POLYMER NETWORKS OF POLYPROPYLENE AND OCK-POLY(ETHYLENE-STAT-BUTYLENE)-BLOCK-POLYSTYRENE - 2 - MELT FLOW AND INJECTION-MOLDING PROPERTIES", Polymer engineering and science, 38(1), 1998, pp. 108-118

Abstract

Injection molding and melt flow properties of a set of blends prepared by mixing the triblock thermoplastic elastomer ock-poly(ethylene-stat-butylene)-block-polystyrene with polypropylene and a processing oil are reported. Despite the high viscosity of the thermoplastic elastomer, the melt viscosity of the blends was similar to or lower than that of the pure polypropylene. The rheological behavior of the molten blends seems to be dominated by a low-viscosity melt phase containing mainly polypropylene and oil. The surface of solidified extrudates from the capillary rheometer was rich in polypropylene and free from large domains of the thermoplastic elastomer. Injection molded plates had a similar surface morphology, although in this case, larger domains of theelastomeric phase were found in narrow, band-shaped surface regions. These local surface heterogeneities were probably caused by flow-induced phase segregation during mold filling. Weld lines in injection molded test pieces prepared from blends within the composition range giving interpenetrating network structures had no noticeable effect on either stress-strain behavior or falling dart impact strength.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 17:50:16