Miscibility, crystallization and melting of poly(3-hydroxybutyrate)/ poly(l-lactide) blends

Blümm, E.; Owen, A. J.

doi:10.1016/0032-3861(95)90987-d

Cited by 278 publications

(188 citation statements)

References 14 publications

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“…So far, many blends containing PHB have been studiedS; however, among these, only blends with 9 13 14 15 poly(ethylene oxide) -, poly(vinyl alcohol) (PVA) ' , poly(L-lactide) 16, poly(o,L-lactide) (PDLLA) 17, poly(e- 18 21 22 24 caprolactone) (PCL)-, poly(fl-butyrolactone)- 25 28 and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) -are totally biodegradable. Polysaccharides, such as cellulose and starch derivatives, are natural polymers, 29 31 and also biodegradable.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable polymer blends of poly(3-hydroxybutyrate) and hydroxyethyl cellulose acetate

Zhang

Deng

Zhao

et al. 1997

Polymer

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Section: Introductionmentioning

confidence: 99%

Biodegradable polymer blends of poly(3-hydroxybutyrate) and hydroxyethyl cellulose acetate

Zhang

Deng

Zhao

et al. 1997

Polymer

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“…PHAs produced from the process are usually composed of 100-30,000 monomers and exist in a short chain. Naturally, the properties of PHAs are similar to thermoplastics that are obtained from petrochemical industry such as polypropylene (PP) and polyethylene (PE) as shown in Table 1 (Evan and Sikdar, 1990 They can be either thermoplastic or elastomeric materials with melting points ranging from 40 to 180°C and the percentage of crystallinity (up to 70-80) is similar (Blumm & Owen, 1995). Thus, they can tolerate organic solvents and even lipid and oil.…”

Section: Phas Structuresmentioning

confidence: 94%

Fermentation of Sweet Sorghum into Added Value Biopolymer of Polyhydroxyalkanoates (PHAs)

Kaewkannetra¹

2012

Products and Applications of Biopolymers

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“…Several studies of the miscibility and morphology for PHB/PLLA blends have been published. [23][24][25][26][27][28][29][30] In our previous studies, the miscibility and dispersibility of PHB/PLLA blends were revealed by IR and Raman microspectroscopy. 29,30 These studies showed that the PHB component is always crystallized in the blends irrespective of the blend ratio, and that both components are mixed in the nonspherulite parts.…”

Section: -16mentioning

confidence: 99%

Evaluation of Homogeneity of Binary Blends of Poly(3-hydroxybutyrate) and Poly(l-lactic acid) Studied by Near Infrared Chemical Imaging (NIRCI)

et al. 2007

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IntroductionPoly((R)-3-hydroxybutyrate) (PHB) and poly(L-lactic acid) (PLLA) are well-studied aliphatic biodegradable polymers. PHB synthesized by bacteria is a biodegradable thermoplastic. [1][2][3][4][5][6][7] PHB has received much attention as a environmentally friendly material because of its thermoplasticity coupled with its biodegradability. However, it has been recognized that PHB is often too rigid and stiff for many applications because of the perfectly isotactic structure consisting exclusively of the R configuration. PLLA produced from renewable resources, such as starch, also is a biodegradable and biocompatible thermoplastic. [7][8][9][10][11] PLLA has already been used in various applications, especially in the medical field, because of its superior biocompatibility. The crystalline structures of PHB and PLLA have been established as orthorhombic systems by means of wide angle X-ray diffraction (WAXD). 12-16The thermal behavior of PHB and PLLA have also been investigated by infrared (IR) spectroscopy, differential scanning calorimetry (DSC), and WAXD. [17][18][19][20][21][22] The physical and mechanical properties of PHB and PLLA are not always suitable for practical applications. Several modifications have been proposed to improve their processing and mechanical properties, such as copolymerization and blending with other biodegradable polymers. Compared to copolymerization methods, physical blending is an easier and faster way to manipulate the desired properties of polymeric materials. Several studies of the miscibility and morphology for PHB/PLLA blends have been published. [23][24][25][26][27][28][29][30] In our previous studies, the miscibility and dispersibility of PHB/PLLA blends were revealed by IR and Raman microspectroscopy. 29,30 These studies showed that the PHB component is always crystallized in the blends irrespective of the blend ratio, and that both components are mixed in the nonspherulite parts. However, these studies were carried out in only some localized spots of samples with different morphology by using polarized light microscopy. Thus, the blends were not analyzed in much wider areas encompassing the entire composite material.Near infrared (NIR) spectroscopy is widely used as a tool for materials characterization. [31][32][33][34] In the NIR region (800 -2500 nm), the overtone and combination bands of the C-H, O-H, and N-H stretching and deformation vibrational modes provide highly specific molecular information for species identification. Sample preparation and handling are relatively straightforward for NIR spectroscopy. Multivariate data analysis has also accelerated the application of NIR spectroscopy. [35][36][37][38] Therefore, NIR spectroscopy has often been adopted as a useful probe in studying polymers. For example, the isothermal crystallization kinetics of PHB was investigated by NIR spectroscopy. 39 An NIR on-line monitoring system has proven to be useful in the quantitative analysis of the molten polyolefin polymers [40][41][42][43] and in the tracking of the ...

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Miscibility, crystallization and melting of poly(3-hydroxybutyrate)/ poly(l-lactide) blends

Cited by 278 publications

References 14 publications

Biodegradable polymer blends of poly(3-hydroxybutyrate) and hydroxyethyl cellulose acetate

Biodegradable polymer blends of poly(3-hydroxybutyrate) and hydroxyethyl cellulose acetate

Fermentation of Sweet Sorghum into Added Value Biopolymer of Polyhydroxyalkanoates (PHAs)

Evaluation of Homogeneity of Binary Blends of Poly(3-hydroxybutyrate) and Poly(l-lactic acid) Studied by Near Infrared Chemical Imaging (NIRCI)

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