Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
PHASE-STRUCTURE AND BIODEGRADATION OF THE BACTERIAL POLY(3-HYDROXYBUTYRIC ACID) CHEMOSYNTHETIC POLY(3-HYDROXYPROPIONIC ACID) BLEND/
Autore:
CAO A; ASAKAWA N; YOSHIE N; INOUE Y;
Indirizzi:
TOKYO INST TECHNOL,DEPT BIOMOL ENGN,MIDORI KU,4259 NAGATSUTA YOKOHAMAKANAGAWA 226850 JAPAN TOKYO INST TECHNOL,DEPT BIOMOL ENGN,MIDORI KU YOKOHAMA KANAGAWA 226850 JAPAN
Titolo Testata:
Polymer Journal
fascicolo: 9, volume: 30, anno: 1998,
pagine: 743 - 752
SICI:
0032-3896(1998)30:9<743:PABOTB>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLY(ETHYLENE OXIDE) BLENDS; ATACTIC POLY(BETA-HYDROXYBUTYRATE); MICROBIAL SYNTHESIS; PHB DEPOLYMERASE; DEGRADATION; BEHAVIOR; KINETICS; MISCIBILITY; POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYPROPIONATE); HETEROGENEITY;
Keywords:
P(3HB)/P(3HP) BLEND; THERMAL AND CRYSTALLIZATION BEHAVIOR; MORPHOLOGY OF SPHERULITE; DYNAMIC MECHANICAL THERMAL ANALYSIS; PROTON SPIN DIFFUSION; MISCIBLE PROPERTY; ENZYMATIC AND ENVIRONMENTAL BIODEGRADATION BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
A. Cao et al., "PHASE-STRUCTURE AND BIODEGRADATION OF THE BACTERIAL POLY(3-HYDROXYBUTYRIC ACID) CHEMOSYNTHETIC POLY(3-HYDROXYPROPIONIC ACID) BLEND/", Polymer Journal, 30(9), 1998, pp. 743-752

Abstract

Two different aliphatic polyesters, bacterially synthesized polyesterpoly(3-hydroxybutyric acid) [P(3HB)] and chemically synthesized poly(3-hydoxypropionc acid) [P(3HP)], were blended via solvent casting. By differential scanning calorimetry, polarized optical microscopy, wide-angle X-ray diffractometer and dynamic mechanical thermal analytical instrument, thermal and crystallization behavior and dynamic mechanicalrelaxation of the as-prepared binary blends were systematically studied. Immiscible properties were ambiguously demonstrated for these blends over the whole range of constituent composition. Glass transition temperature and proton spin diffusion times (T-1(H) and T-1 rho(H)) obtained by the high-resolution solid state C-13 NMR measurements indicated that the blend system was immiscible not only on an observation scale of DSC (about 10 nm), but on a T-1(H) scale (several tens of nm). Enzymatic biodegradation of the blend samples by extracellular P(3HB)-depolymerase from the bacterium strain A. faecalis T1 showed an approximately linear relation between the degradation rate and the component composition. In addition, on the basis of biochemical oxygen demand (BOD), pure P(3HP) could not be biodegraded in the river water, while environmental biodegradability was confirmed when it presents as one constitutive component of the binary P(3HB)/P(3HP) blend.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:02:13