Morphology of poly(3-hydroxybutyrate)–polyvinyl alcohol extrusion films
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Anatoly A. Ol’khov
,
Alexey L. Iordanskii
Abstract
The morphology of extruded films based on blends of polyvinyl alcohol (PVA) and poly(3-hydroxybutyrate) (PHB) was studied for various compositions. The methods of differential scanning calorimetry (DSC) and X-ray analysis were used. The phase-sensitive characteristics of the composite films, diffusion and water vapor permeability were also investigated. Processes of binding of water and swelling cause the first areas; processes of a relaxation and transition of structure of composites to an equilibrium condition, the second. In addition, the tensile modulus and relative elongation-at-break were measured. Changes in the glass transition temperature (Tg) of the blends and constant melting points of the components show their partial compatibility in intercrystalline regions. At a content of PHB in the composite films equal to 20–30% wt., the mechanical characteristics and water diffusion coefficients are dramatically changed. This fact, along with the analysis of the X-ray diffractograms, indicates a phase inversion in the above narrow concentration interval. The complex pattern of the kinetic curves of water vapor permeability is likely to be related to additional crystallization, which is induced in the composite films in the presence of water.
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Artikel in diesem Heft
- Frontmatter
- Original articles
- Functionalization of polyolefin melts containing carbon nanotubes and the properties of their blends with polyamide 6
- Electrical percolation in composites of conducting polymers and dielectrics
- Tris(hydroxydietylene)-2-hydroxypropane-1,2,3-tricarboxylate for rigid PUR-PIR foams
- Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior
- Morphology of poly(3-hydroxybutyrate)–polyvinyl alcohol extrusion films
- Preparation and characteristics of polypropylene-clay nanocomposite fibers
- Poly(ethylene terephthalate)/poly(ethylene-co-vinyl alcohol) sheath-core fibers: preparation and characterization
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Artikel in diesem Heft
- Frontmatter
- Original articles
- Functionalization of polyolefin melts containing carbon nanotubes and the properties of their blends with polyamide 6
- Electrical percolation in composites of conducting polymers and dielectrics
- Tris(hydroxydietylene)-2-hydroxypropane-1,2,3-tricarboxylate for rigid PUR-PIR foams
- Poly(lactic acid)/polypropylene and compatibilized poly(lactic acid)/polypropylene blends prepared by a vane extruder: analysis of the mechanical properties, morphology and thermal behavior
- Morphology of poly(3-hydroxybutyrate)–polyvinyl alcohol extrusion films
- Preparation and characteristics of polypropylene-clay nanocomposite fibers
- Poly(ethylene terephthalate)/poly(ethylene-co-vinyl alcohol) sheath-core fibers: preparation and characterization
- Effects of different starch types on the physico-mechanical and morphological properties of low density polyethylene composites
- Morphology and thermomechanical properties of epoxy composites highly filled with waste bulk molding compounds (BMC)
