Journal ArticleDOI
Miscibility, crystallization, and mechanical properties of poly(3‐hydroxybutyrate) and poly(propylene carbonate) biodegradable blends
Dong Zhi Yang,Ping Hu +1 more
TLDR
In this article, the mixture of poly(3-hydroxybutyrate) and poly(propylene carbonate) (PPC), biodegradable polyester, and pure sample films were prepared with the ratio of PHB/PPC ranging from 90/10 to 10/90 by codissolving these two polyesters in chloroform and casting the mixture.Abstract:
Nine blends of poly(3-hydroxybutyrate) (PHB) and poly(propylene carbonate) (PPC), biodegradable polyester, and pure sample films were prepared with the ratio of PHB/PPC ranging from 90/10 to 10/90 by codissolving these two polyesters in chloroform and casting the mixture. The miscibility, crystallization, melting behavior, morphology, and mechanical properties of the blends have been studied by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), wide angle X-ray diffraction (WAXD), polarizing optical microscopy (POM), and scanning electron micrograph (SEM). The results indicated that PHB showed complete miscibility with PPC for PHB/PPC 30/70, 20/80, and 10/90, as evidenced by the only one composition-dependent glass transitions (Tg) of blends, and the Tgs close to the values calculated using the Fox equation. However, PHB showed immiscibility with PPC for the other six blends, as shown by the existence of almost unchanged Tg of PHB at about 2°C. According to the DSC analysis, the crystallization of PHB was suppressed by blending with abundant PPC. This result is consistent with results obtained from X-ray and POM results. Some interaction between the two macromolecules was confirmed by using FTIR analysis. SEM graphs showed that the blends containing PHB ≤ 30 wt % tend to form a more compact structure, and no obvious phase separation was found. The brittleness of PHB was improved apparently by blending with PPC. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008read more
Citations
More filters
Journal ArticleDOI
Recent progress in carbon dioxide (CO2) as feedstock for sustainable materials development: Co-polymers and polymer blends
TL;DR: In this article, the authors provide a general overview of the recent progress achieved in CO2-based polymers for sustainable biopolymers such as co-polymers, and polymer blends.
Journal ArticleDOI
Compatibilization by homopolymer: significant improvements in the modulus and tensile strength of PPC/PMMA blends by the addition of a small amount of PVAc.
Yongjin Li,Hiroshi Shimizu +1 more
TL;DR: The morphological investigation indicates that the incorporation to PVAC not only induces the finer dispersion of PMMA in the PPC matrix but also results in the phase transformation from a sea-island to a co-continuous structure.
Journal ArticleDOI
Mechanical and thermal properties of eco-friendly poly(propylene carbonate)/cellulose acetate butyrate blends.
TL;DR: The incorporation of CAB into PPC matrix enhanced not only tensile strength and modulus of PPC dramatically, but also improved heat resistance and thermal stability of P PC significantly.
Journal ArticleDOI
Decomposition of poly(propylene carbonate) with UV sensitive iodonium salts
Todd J. Spencer,Paul A. Kohl +1 more
TL;DR: In this article, the decomposition characteristics of poly(propylene carbonate) containing a photoacid generator have been studied and the influence of casting solvent, photoacid concentration and type, UV exposure dose, substrate surface, and ambient gas were included in the study.
Journal ArticleDOI
Effect of homopolymer poly(vinyl acetate) on compatibility and mechanical properties of poly(propylene carbonate)/poly(lactic acid) blends
TL;DR: A small amount of homopolymer polyvinyl acetate (PVAc) is used to compatibilize the biodegradable blends of poly(propylene carbonate) (PPC) and poly(lactic acid) (PLA) as discussed by the authors.
References
More filters
Journal ArticleDOI
Crystallization and morphology of a bacterial thermoplastic: poly-3-hydroxybutyrate
TL;DR: In this paper, a number of interesting results on the physical properties of poly-3-hydroxybutyrate (PHB) were presented on crystallization kinetics, morphology of melt-and solution-crystallized PHB, the variation of lamellar thickness with crystallization temperature, and the assessment of some thermodynamic quantities.
Journal ArticleDOI
Applications of PHB - a microbially produced biodegradable thermoplastic
TL;DR: ICI has recently made available a new range of environmentally degradable thermoplastics made by bacteria from renewable substrates, which are now being evaluated in speciality applications as discussed by the authors.
Journal ArticleDOI
Crystallization and thermal behaviour of poly(d(—)-3-hydroxybutyrate)-based blends
Pietro Greco,Ezio Martuscelli +1 more
TL;DR: In this paper, the influence of molecular structure and characteristics of an uncrystallized rubbery second component (EPR) and poly(vinyl acetate) (PVAc)) on the melt miscibility, phase structure, morphology, thermal and crystallization behaviour of blends based on poly( d (−)-3-hydroxybutyrate (PHB) has been investigated by differential scanning calorimetry and optical microscopy.
Journal ArticleDOI
Biotechnology. An industrial view
TL;DR: The concept of biotechnology is concerned with the production of new wonder drugs, such as interferon as discussed by the authors, however, another side to the subject is large-scale biotechnology concerned with biological processes for making many of the everyday bulk production on which society depends.
Journal ArticleDOI
Miscibility of Binary Blends of Poly((R)-3-Hydroxybutyric Acid) and Poly((S)-Lactic Acid)
Naoyuki Koyama,Yoshiharu Doi +1 more
TL;DR: In this paper, the structure of binary blends of P[(R)-3-hydroxybutyric acid/P[(S)-LA] with various molecular weights (Mw = 9900-530 000) have been studied by means of differential scanning calorimetry.
Related Papers (5)
Compatibility characterization of poly(lactic acid)/poly(propylene carbonate) blends
Xiaofei Ma,Jiugao Yu,Ning Wang +2 more