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Lamellar Morphology of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Poly(methyl methacrylate) Blends Probed by Small Angle X-ray Scattering

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Abstract

The lamellar morphology of a melt-miscible blend consisting of random poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (P(HB-co-HV)) copolymer containing 10 mol% HV units and poly(methyl methacrylate) (PMMA) prepared by solution casting films have been investigated by means of small angle X-ray scattering (SAXS), differential scanning calorimetry (DSC) and polarized optical microscope (POM). The composition dependence of the amorphous layer thickness (la), and the volume fraction of the P(HB-co-HV) lamellar stack (φs) revealed that the interfibrillar segregation morphology was generated, where the extent of interfibrillar segregation of PMMA increased with increasing PMMA content. The Lorentz-corrected SAXS profiles of the blends crystallized at Tc=40 ○C has observed “zero-angle scattering”, attributed to the electron density contrast between the lamellar stack domains consisting of alternating crystalline/amorphous layers and the PMMA-rich domains located outside the lamellar stack domains.

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Authors and Affiliations

  1. Department of Chemical Engineering, Ta Hwa Institute of Technology, Chiunglin, Hsinchu, 30703, Taiwan, R.O.C.

    Hsiu-Jung Chiu & Wei-Jye Shu

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  1. Hsiu-Jung Chiu
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  2. Wei-Jye Shu
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Correspondence to Hsiu-Jung Chiu.

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Chiu, HJ., Shu, WJ. Lamellar Morphology of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Poly(methyl methacrylate) Blends Probed by Small Angle X-ray Scattering. J Polym Res 12, 149–157 (2005). https://doi.org/10.1007/s10965-004-1862-2

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  • DOI: https://doi.org/10.1007/s10965-004-1862-2

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