Synthesis, morphology and thermal properties of polyurethanes nanocomposites based on poly(3-hydroxybutyrate) and organoclay

Naguib, Hala F.; Aziz, Mohamed S. Abdel; Saad, Gamal R.

doi:10.1016/j.jiec.2012.06.023

Cited by 21 publications

(9 citation statements)

References 30 publications

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“…Epoxy/clay nanocomposites with low clay concentrations exhibit markedly improved mechanical strength, thermal stability, permeability, and flammability compared to pristine epoxy matrices and traditional micro/macro composites. The superior performance of the epoxy/clay composites arises from the ultra high interface/volume ratio in the nanocomposites, resulting from the nanometer scale clay particles dimensions [115][116][117][118].…”

Section: Epoxy/clay Nanocompositesmentioning

confidence: 99%

Synthesis and application of epoxy resins: A review

Jin

Park

2015

Journal of Industrial and Engineering Chemistry

1,592

612

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Section: Epoxy/clay Nanocompositesmentioning

confidence: 99%

Synthesis and application of epoxy resins: A review

Jin

Park

2015

Journal of Industrial and Engineering Chemistry

1,592

612

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“…elastomer [13] polyaniline [14]. These blending composites can improve physical properties by some extent and reduce the cost, but also there are some problems in compatibility.…”

mentioning

confidence: 99%

Structural characteristics and enhanced mechanical and thermal properties of full biodegradable tea polyphenol/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) composite films

Chen¹,

Cheng²,

Zhu³

et al. 2013

Express Polym. Lett.

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Recently, bacterial polyester poly(hydroxybutyrateco-hydroxyvalerate) (PHBV) has been arising much attention in the field of biomedical and environmental friendly materials because of its good biocompatibility, biodegradability as well as thermoplastic properties. However, the wide application has been restricted by the poor mechanical properties and narrow processing window [1]. Therefore, a significant amount of work has been devoted to improving mechanical and thermal properties of PHBV via PHBV-based polymer blends and composites [2]. This work mainly covers four aspects: nanoparticles/PHBV composites, traditional petrochemicalbased materials/PHBV composites, biodegradable petrochemical-based polymer/PHBV composites, and bio-based materials/PHBV composites. In nanoparticles/PHBV composites, inorganic nanoparticles mainly include oxide [3], nitride [4], mineralization materials [5,6], carbon materials or minerals [7], and layered double hydroxides [8,9]. Organic nanoparticles mainly include cellulose nanocrystal [10], chitosan nanocrystal and starch nanocrystal [11]. The introduction of nanoparticles is helpful for improving the physical properties and processing properties of PHBV through increasing the nucleation density and decreasing the spherulite size. In petrochemical-based materials/PHBV composites, the additive components consist mainly of non-biodegradable polyolefin [12] Abstract. Full biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) composite films were prepared with 5~40 wt% green tea polyphenol (TP) as toughener. The effects of mixing TP on mechanical properties, thermal properties and hydrophilic-hydrophobic properties of composite films were investigated. Tension test results show that the incorporation of TP in the PHBV matrix can enhance the toughness of the composite films. Differential scanning calorimetric (DSC) studies show that there is a single glass transition temperature and the lower melting point temperature. Fourier transform infrared (FT-IR) results confirm that the intermolecular hydrogen bonding interactions in composite films. Contact angle measurements show that the hydrophilicity of TP/PHBV composite films can be controlled through adjusting the composition of TP.

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“…This peak may be assigned to the scattering from PU chains with regular interplanar spacing . For PUs samples containing 20.0 and 40.0% PHB, two strong diffraction peaks related to crystallite of the PHB segments are observed around 2 θ = 15.1° and 17.1° assigned to be (020) and (110) of the orthorhombic unit cell, respectively , and their relative intensity increases with increasing the PHB content. On comparing the diffraction pattern of U(PHB/CO)‐20 with its nanocomposite, no change in the diffraction peaks of PHB is observed.…”

Section: Resultsmentioning

confidence: 95%

Preparation and characterization of bio‐based polyurethanes obtained from castor oil and poly (3‐hydroxybutyrate) and their nanocomposites

2017

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Bio‐based polyurethanes (PUs) were synthesized from castor oil (CO) and poly(3‐hydroxybutyrate)‐diol (PHB‐diol) using 1,6‐hexamethylene diisocyanate, as nontoxic connecting agent. The PHB content in the obtained PUs was adjusted from 0 to 60.0 wt%. The synthesis was carried out by one pot solution polymerization. PUs nanocomposites loaded with different contents of cloisite®25A (C25A) were prepared by means of in situ solution polymerization. The molecular structure of the obtained PUs was confirmed by FT‐IR. The thermal properties of the neat PUs and the resulting nanocomposites were investigated using DSC and TGA. It was found that the cold crystallization of the PHB component was enhanced, while its melt crystallization was retarded with increasing its own content in the PUs. The incorporated C25A in the PU matrix shifted the cold crystallization peak to higher temperature. TGA studies reveal that neat PUs and nanocomposites exhibited three main decompositions steps. The thermal stability of the neat PUs decreased with increasing the PHB content and increased with increasing the C25A content. Tensile mechanical testing revealed that increasing the content of the PHB and C25A made the PUs rigid and strong. The elastic modulus and ultimate tensile strength of the neat PUs were found to increase with increasing the PHB content and enhanced with incorporation of C25A, while the elongation decreased with increasing the PHB and C25A content. The equilibrium swelling in 1,2‐dichloroethane decreased with increasing both the PHB and C25A content in PU matrix. POLYM. COMPOS., 39:E489–E499, 2018. © 2017 Society of Plastics Engineers

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Synthesis, morphology and thermal properties of polyurethanes nanocomposites based on poly(3-hydroxybutyrate) and organoclay

Cited by 21 publications

References 30 publications

Synthesis and application of epoxy resins: A review

Synthesis and application of epoxy resins: A review

Structural characteristics and enhanced mechanical and thermal properties of full biodegradable tea polyphenol/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) composite films

Preparation and characterization of bio‐based polyurethanes obtained from castor oil and poly (3‐hydroxybutyrate) and their nanocomposites

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