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      Preparation, Characterization and Processing of PCL/PHO Blends by 3D Bioplotting

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      International Polymer Processing

      Carl Hanser Verlag

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          Abstract

          Blends of polycaprolactone (PCL) and poly(3-hydroxyoctanoate) P(3HO) were prepared by melt compounding. These immiscible blends exhibited droplet-matrix morphology at compositions up to 30 wt% P(3HO). Even though the addition of amorphous P(3HO) decreased the crystallinity of PCL, the crystallization temperature of the blends increased by 6 to 7 °C. Blends containing up to 30 wt% P(3HO) had higher crystallization rates, and lower crystallization half-times compared to neat PCL. The viscosity of PCL decreased upon addition of P(3HO), making the blends suitable for processing using a 3D bioplotter. Compositions with 10 to 30 wt% P(3HO) were ideal for processing, because of their improved crystallization kinetics, reduced stickiness and good flow properties. Estimation of the interfacial tension by fitting the Palierne model to the linear viscoelastic properties of the blends revealed good compatibility, which gave rise to synergistic effects in the thermal and mechanical properties. The fibres prepared by 3D bioplotting maintained droplet matrix morphology, with finer particle size than the original compounded material. In addition to favourable viscosity and thermal properties, the extruded fibres containing 30 wt% P(3HO) had comparable modulus to the neat PCL, while exhibiting good ductility. These blends may be suitable alternatives to PCL for biomedical applications, because they provide a range of crystallinities, crystallization rates and viscosities.

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          Most cited references 68

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          DISPERSION PHENOMENA IN HIGH VISCOSITY IMMISCIBLE FLUID SYSTEMS AND APPLICATION OF STATIC MIXERS AS DISPERSION DEVICES IN SUCH SYSTEMS

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            Crystallization and morphology of a bacterial thermoplastic: poly-3-hydroxybutyrate

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              The return of a forgotten polymer—Polycaprolactone in the 21st century

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                20 November 2020
                : 35
                : 5
                : 458-470
                Affiliations
                Department of Chemical Engineering, Queen's University, Kingston, ON, Canada
                Author notes
                [] Correspondence address, Mail address: Marianna Kontopoulou, Department of Chemical Engineering, Queen's University, Kingston, ON K7L3N6, Canada, E-mail: kontopm@ 123456queensu.ca
                Article
                IPP3971
                10.3139/217.3971
                © 2020, Carl Hanser Verlag, Munich
                Page count
                References: 68, Pages: 13
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
                Regular Contributed Articles

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