Differential thermal analysis of linear polyesters

Schulken, R. M.; Boy, Ramiz; Cox, R. H.

doi:10.1002/polc.5070060104

Cited by 25 publications

(7 citation statements)

References 2 publications

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“…This ring flip increases the mobility of the chain because the incorporation of CHDM allows relaxation from its conformational transition, resulting in ductility [2][3][4] along with excellent properties. 1,[3][4][5] However, one problem lies with its rigid structure, which gives rise to a high melting temperature (T m ) (278-318 °C) compared to other conventional polyesters (PET: 250 °C and PBT: 225 °C). Due to its high T m , a 300 °C processing temperature is required, which is close to its decomposition temperature.…”

Section: Introductionmentioning

confidence: 99%

Structural and thermal properties of poly(1,4-cyclohexane dimethylene terephthalate) containing isosorbide

et al. 2015

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Poly(1,4-cyclohexanedimethylene isosorbide terephthalate) (PICT) copolymers were synthesized by melt condensation with various contents of the corn derived monomer isosorbide (ISB). Since poly(1,4-cyclohexanedimethylene terephthalate) (PCT) has disadvantageous thermal processing properties as well as a high melting temperature, ISB could be used to control T g and T m simultaneously. An increased content of ISB can increase the T g and lower the T m by affecting the crystallization behavior and structural properties of PCT. The composition of PICT was confirmed using 1 H-NMR spectroscopy, and the detailed structure was analyzed with correlation spectroscopy (COSY) and heteronuclear single-quantum correlation spectroscopy (HSQC). 13 C-NMR spectroscopy was used for investigating the sequence distribution and from these results, the effect of the ISB-TPA dyad on the thermal properties was revealed. Solid state cross polarization/magic angle spinning (CPMAS) 13 C-NMR spectroscopy was used to investigate the free space of an atom due to environment dependent relaxation behavior, which determines whether ISB is excluded from the crystal structure. Then, WAXD was used to analyze the crystal structure, representing the effect of ISB on the crystallization. Finally, polarized optical microscopy and atomic force microscopy were used to visualize the morphological change of the crystallite resulting from ISB. † Electronic supplementary information (ESI) available. See

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Section: Introductionmentioning

confidence: 99%

Structural and thermal properties of poly(1,4-cyclohexane dimethylene terephthalate) containing isosorbide

et al. 2015

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“…However, the random incorporation of a second monomeric unit unavoidably entails a significant depression in the melting temperature of crystalline polymers that may restrict the temperature range over which the copolyester can be used to unacceptable values [14][15][16][17]. In order to surpass this shortcoming, some authors have introduced the ionomer approach into the field of bio-based polyesters [18,19].…”

Section: Introductionmentioning

confidence: 99%

Poly(butylene succinate) Ionomers with Enhanced Hydrodegradability

et al. 2015

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A series of poly(butylene succinate) (PBS) ionomers containing up to 14 mol% of sulfonated succinate units have been synthesized by polycondensation in the melt-phase. The copolyesters were obtained with weight average molecular weights oscillating between 33,000 and 72,000 g·mol−1. All copolyesters were semicrystalline with melting temperatures and enthalpies decreasing and glass transition temperatures increasing with the content of ionic units. The thermal stability of PBS was slightly reduced by the incorporation of these units, and it was also found that the copolyesters were stiffer but also more brittle than PBS. The hydrolytic degradability of PBS was enhanced by copolymerization, an effect that was much more pronounced in basic media.

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“…In figures 8 and 9 are reported respectively the melting peaks of the composite with 2% and 3% catalyst [12]. The peak temperatures at the maximum of the broad endotherms are reported in Table 4.…”

Section: Meltingmentioning

confidence: 99%

Thermal aging and catalyst concentration effects on thermo-dynamical and mechanical properties of a polyester fiberglass composite

et al. 2021

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This work deals with the characterization by physicochemical and mechanical analysis performed on composite polyester fiberglass plates molded by contact and aged in thermo-stated ovens to simulate their deleterious environment of use. The DSC analysis revealed that the catalyst concentration affected the thermal behavior of the composite. Indeed, the addition of a higher catalyst concentration slightly lowered the glass transition temperature. From a mechanical point of view, it was observed that the catalyst addition made the material stiffer. The properties at fracture were also affected by the catalyst concentration and varied irregularly with aging.

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Differential thermal analysis of linear polyesters

Cited by 25 publications

References 2 publications

Structural and thermal properties of poly(1,4-cyclohexane dimethylene terephthalate) containing isosorbide

Structural and thermal properties of poly(1,4-cyclohexane dimethylene terephthalate) containing isosorbide

Poly(butylene succinate) Ionomers with Enhanced Hydrodegradability

Thermal aging and catalyst concentration effects on thermo-dynamical and mechanical properties of a polyester fiberglass composite

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