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1
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Using PCL oligomers to study the differences in melting behavior between polymers and small molecules crystals. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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2
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Crystallization kinetics and equilibrium melting temperature of poly(ether ketone ketone) with high terephthalate content utilizing fast scanning calorimetry. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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3
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Sukhonthamethirat N, Vao‐soongnern V, Okamoto S, Sakurai S. Morphology and crystallization kinetics of G‐resins and isotactic polypropylene. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Visit Vao‐soongnern
- School of Chemistry, Institute of Science Suranaree University of Technology Nakhon Ratchasima Thailand
| | - Shigeru Okamoto
- Department of Life Science and Applied Chemistry Nagoya Institute of Technology Nagoya Japan
| | - Shinichi Sakurai
- Department of Biobased Materials Science Kyoto Institute of Technology Kyoto Japan
- Department of Chemical Engineering Indian Institute of Technology Guwahati Kamrup India
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4
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Marcomini AL, Dias JA, Morelli MR, Bretas RES. Flexible and high dielectric permittivity composites of Na
1/
3
Ca
1
/
3
Bi
1
/
3
Cu
3
Ti
4
O
12
and vinylidene fluoride‐trifluoroethylene copolymer (P[
VDF‐co‐TrFE
]). POLYM ENG SCI 2022. [DOI: 10.1002/pen.25940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andre L. Marcomini
- Federal University of Sao Carlos Graduate Program in Materials Science and Engineering São Carlos Brazil
| | - Jeferson A. Dias
- Federal University of Sao Carlos Graduate Program in Materials Science and Engineering São Carlos Brazil
| | - Marcio R. Morelli
- Federal University of Sao Carlos Graduate Program in Materials Science and Engineering São Carlos Brazil
- Federal University of Sao Carlos Department of Materials Engineering São Carlos Brazil
| | - Rosario E. S. Bretas
- Federal University of Sao Carlos Graduate Program in Materials Science and Engineering São Carlos Brazil
- Federal University of Sao Carlos Department of Materials Engineering São Carlos Brazil
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5
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Silva LEJ, Volnistem EA, Dias GS, Cótica LF, Santos IA, Fiorentin ER, de Oliveira MA, Witchemichen DH, Freitas VF, Bonadio TGM. Polyvinylidene fluoride - Hydroxyapatite 0-3 biocomposite filaments processed by twin-screw extrusion. J Mech Behav Biomed Mater 2021; 125:104891. [PMID: 34689030 DOI: 10.1016/j.jmbbm.2021.104891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 10/08/2021] [Accepted: 10/10/2021] [Indexed: 10/20/2022]
Abstract
Polyvinylidene fluoride - hydroxyapatite composite filaments were processed by twin-screw extrusion at different processing angular velocities and characterized by scanning electron and atomic force microscopies, differential scanning calorimetry and tensile tests. Polymer-ceramic composites with a 0-3 connectivity were successfully obtained. Regardless of the used processing parameters, all composite filaments present very similar melting (∼152°C) and solidification (∼139°C) points and elastic moduli (∼1.0 GPa) for hydroxyapatite as dispersed phase in the composite with concentrations up to 25 wt%, indicating that they are adequate for twin-screw extrusion and 3D printing. However, the yield strength (∼29 MPa), ultimate tensile strength (∼36 MPa) and tensile point (∼29 MPa) parameters are similar only for hydroxyapatite concentrations up to 15 wt%, once higher concentrations of hydroxyapatite as dispersed phase result in fragile samples (∼50% lower for each studied property).
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Affiliation(s)
- L E J Silva
- Graduate Program in Mechanical Engineering, State University of Maringá, Av. Colombo 5790, Maringá, PR, Brazil
| | - E A Volnistem
- Department of Physics, State University of Maringá, Av. Colombo 5790, Maringá, PR, Brazil
| | - G S Dias
- Department of Physics, State University of Maringá, Av. Colombo 5790, Maringá, PR, Brazil
| | - L F Cótica
- Department of Physics, State University of Maringá, Av. Colombo 5790, Maringá, PR, Brazil
| | - I A Santos
- Graduate Program in Mechanical Engineering, State University of Maringá, Av. Colombo 5790, Maringá, PR, Brazil; Department of Physics, State University of Maringá, Av. Colombo 5790, Maringá, PR, Brazil.
| | - E R Fiorentin
- Department of Physics, Midwestern Paraná State University, Al. Élio A. D. Vecchia 838, Guarapuava, PR, Brazil
| | - M A de Oliveira
- Department of Physics, Midwestern Paraná State University, Al. Élio A. D. Vecchia 838, Guarapuava, PR, Brazil
| | - D H Witchemichen
- Department of Physics, Midwestern Paraná State University, Al. Élio A. D. Vecchia 838, Guarapuava, PR, Brazil
| | - V F Freitas
- Department of Physics, Midwestern Paraná State University, Al. Élio A. D. Vecchia 838, Guarapuava, PR, Brazil
| | - T G M Bonadio
- Department of Physics, Midwestern Paraná State University, Al. Élio A. D. Vecchia 838, Guarapuava, PR, Brazil
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7
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Extending Cooling Rate Performance of Fast Scanning Chip Calorimetry by Liquid Droplet Cooling. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11093813] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The liquid droplet cooling technique for fast scanning chip calorimetry (FSC) is introduced, increasing the cooling rate for large samples on a given sensor. Reaching higher cooling rates and using a gas as the cooling medium, the common standard for ultra-fast temperature control in cooling requires reducing the lateral dimensions of the sample and sensor. The maximum cooling rate is limited by the heat capacity of the sample and the heat exchange between the gas and the sample. The enhanced cooling performance of the new liquid droplet cooling technique is demonstrated for both metals and polymers, on examples of solidification of large samples of indium, high-density polyethylene (HDPE) and poly (butylene 2,6-naphthalate) (PBN). It was found that the maximum cooling rate can be increased up to 5 MK/s in room temperature environment, that is, by two orders of magnitude, compared to standard gas cooling. Furthermore, modifying the droplet size and using coolants at different temperatures provide options to adjust the cooling rate in the temperature ranges of interest.
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8
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Melting and Annealing Peak Temperatures of Poly(butylene succinate) on the Same Hoffman-Weeks Plot Parallel to Tm=Tc Line. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-021-2530-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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11
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Crystallization and melting of poly(butylene terephthalate) and poly(ethylene terephthalate) investigated by fast-scan chip calorimetry and small angle X-ray scattering. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122303] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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