Insolubilization and thermal stabilization of a long‐chain polyester by noncatalyzed melt‐polycondensation synthesis in air

Insolubilization and thermal stabilization of a long‐chain polyester by noncatalyzed melt‐polycondensation synthesis in air

ABSTRACT Self‐standing films of poly(ω‐hydroxyl hexadecanoic acid) [poly(ω‐OHC16)] have been prepared by noncatalyzed melt‐polycondensation in air at 150, 175, and 200 °C. Poly(ω‐OHC16)s obtained are characterized as polyesters by infrared spectroscopy (FT‐IR) and solid state magic angle spinning 13...

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Bibliographic Details
Published in:Journal of applied polymer science Vol. 134; no. 1; pp. np - n/a
Main Authors: Benítez, José Jesús, Heredia‐Guerrero, José Alejandro, Cruz‐Carrillo, Miguel Antonio, Barthel, Markus Joachim, Knicker, Heike Elisabeth, Heredia, Antonio
Format: Journal Article
Language:English
Published: Hoboken Wiley Subscription Services, Inc 05-01-2017
Subjects:
coatings
Crystallites
Foils
Infrared spectroscopy
Materials science
polycondensation
Polyester resins
polyesters
Polymers
Solvents
Spinning
Stabilization
Synthesis
thermosets
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Summary:ABSTRACT Self‐standing films of poly(ω‐hydroxyl hexadecanoic acid) [poly(ω‐OHC16)] have been prepared by noncatalyzed melt‐polycondensation in air at 150, 175, and 200 °C. Poly(ω‐OHC16)s obtained are characterized as polyesters by infrared spectroscopy (FT‐IR) and solid state magic angle spinning 13C nuclear magnetic resonance (13C MAS‐NMR). Structurally, poly(ω‐OHC16)s are quite crystalline as revealed by wide angle X‐ray diffraction (WAXD). The presence of oxygen in the reaction atmosphere causes a mild oxidation in the form of peroxyester species, tentatively at the interphase between poly(ω‐OHC16) crystallites, and the structure amorphization. The interfacial peroxyester phase ends up in the encapsulation of the polyester grains and provides a barrier towards the action of solvents. Thermal stabilization and insolubility resulting from the synthesis conditions used are interesting features to prepare solvent and heat resistant poly(ω‐OHC16) coatings. Thus, a few microns thick poly(ω‐OHC16) layer has been fabricated on aluminum foil and its resistivity towards a chloroform:methanol (1:1, v:v) mixture has been confirmed. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44350.
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ISSN:0021-8995
1097-4628
DOI:10.1002/app.44350