Studies on the blends of carbon dioxide copolymer. III. NBR/PPC systems

Huang, Yuhui; Yang, Xi; Zhao, Sijia; Ge, Lin; Chen, M. C.; Liao, Bing; Wang, C. Q.; Cong, Guangmin; Chen, L. B.

doi:10.1002/(sici)1097-4628(19960829)61:9<1479::aid-app7>3.0.co;2-g

Cited by 13 publications

(6 citation statements)

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“…The fact that the CO stretching bands of blend shifted to a higher wave number showed that between PHB and PPC there exist some interaction. The certain interaction between PHBV and PPC was confirmed in the melting blend PHBV/PPC 30/70 24. The change trends of FTIR spectra of PHB/PPC blend are similar to that of PHBV/PPC blend.…”

Section: Resultssupporting

confidence: 54%

“…Furthermore, PPC is an amorphous polymer, with about 40–50% of units in the PPC copolymer chain being carbonate 23. Recently, some efforts have been invested to apply PPC as plasticizer for rubber or thermoplastics, and surfactant 24–27. Only a few studies have been reported on blend systemscomposed of PPC and other polymers, as the crystallization behavior of PHBV/PPC (30/70) melt blend was investigated.…”

Section: Introductionmentioning

confidence: 99%

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Miscibility, crystallization, and mechanical properties of poly(3‐hydroxybutyrate) and poly(propylene carbonate) biodegradable blends

Yang

2008

J of Applied Polymer Sci

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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 (T g ) of blends, and the T g s 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 T g of PHB at about 28C. 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.

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Section: Resultssupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Miscibility, crystallization, and mechanical properties of poly(3‐hydroxybutyrate) and poly(propylene carbonate) biodegradable blends

Yang

2008

J of Applied Polymer Sci

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“…Therefore, the produced PPC is still far from practical use. Some efforts have been made to use PPC as a plasticizer/additive for rubber, thermoplastics, or surfactants − . Investigations have also been carried out to modify the physical properties of PPC by melt compounding.…”

Section: Introductionmentioning

confidence: 99%

Compatibilization by Homopolymer: Significant Improvements in the Modulus and Tensile Strength of PPC/PMMA Blends by the Addition of a Small Amount of PVAc

Shimizu

2009

ACS Appl. Mater. Interfaces

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Poly(propylene carbonate) (PPC), a polymer produced from CO2, has been melt-mixed with 30 wt % poly(methyl methacrylate) (PMMA) with the aim of enhancing the physical properties of PPC for practical use but keeping a relatively high CO2 fixing rate in the compound. The observation of a coarse phase structure with a large PMMA domain size and a large size distribution in the blend indicates the immiscibility between PPC and PMMA. The addition of a small amount of poly(vinyl acetate) (PVAc) not only shifts the glass transition temperatures (T(g)'s) of both PPC and PMMA markedly but also significantly increases the modulus and tensile strength of the blend. The prepared compound with 5 per hundred parts of resin PVAc shows a 26 times higher elastic modulus and an approximately 3.8 times higher tensile strength than pure PPC at room temperature. 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.

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“…Furthermore, PPC is an amorphous polymer, with about 40-50% of units in the PPC copolymer chain being carbonate. Recently, some efforts have been invested to apply PPC as plasticizer for rubber or thermoplastics, and surfactant [26][27][28][29]. PPC is an amorphous polymer with a chemical structure similar with PLA.…”

mentioning

confidence: 99%

Modification of poly(lactic acid)/poly(propylene carbonate) blends through melt compounding with maleic anhydride

Yao¹,

Deng²,

Mai³

et al. 2011

Express Polym. Lett.

104

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Maleic anhydride (MA) is incorporated into poly(lactic acid) (PLA)/poly(propylene carbonate) (PPC) blends to modify its properties through melt compounding. It is interesting to note that the toughness of PLA/PPC blends can be improved by 1355% while the strength is almost kept constant by adding very low content (as low as 0.9%) of MA into the blends. However, higher MA content in the blends leads to decrease in strength and further increase in toughness indicating an obvious plasticizing effect, while MA is shown to have no effect on the toughness of neat PLA. Rheological, scanning electron microscopy (SEM) and dynamic mechanical analysis (DMA) studies have been carried out to understand the above results. It is believed that the improvement in mechanical performance originated from the largely retained molecular weight of PPC and improved interfacial interaction after processing. And relative large amount of MA in the blends is shown to mainly plasticize the PPC phase rather than the PLA phase. Such an effective method could provide PLA based biodegradable polymer blends with novel properties for industrial applications

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Studies on the blends of carbon dioxide copolymer. III. NBR/PPC systems

Cited by 13 publications

References 0 publications

Miscibility, crystallization, and mechanical properties of poly(3‐hydroxybutyrate) and poly(propylene carbonate) biodegradable blends

Miscibility, crystallization, and mechanical properties of poly(3‐hydroxybutyrate) and poly(propylene carbonate) biodegradable blends

Compatibilization by Homopolymer: Significant Improvements in the Modulus and Tensile Strength of PPC/PMMA Blends by the Addition of a Small Amount of PVAc

Modification of poly(lactic acid)/poly(propylene carbonate) blends through melt compounding with maleic anhydride

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