Crystal growth and physical characterization of picolinic acid cocrystallized with dicarboxylic acids

Somphon, Weenawan; Haller, Kenneth J.

doi:10.1016/j.jcrysgro.2012.01.059

Cited by 20 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis range was between 4°and 30°using a scan rate of 4°/min. The relative amount of promoted b-crystal was determined according to standard procedures described in literature using the Turner-Teller formula [15] …”

Section: Waxd Measurements Of the Ipp Ipp/tio 2 And Ipp/ Tio 2 -Pamentioning

confidence: 99%

“…The main crystalline phases are known as a-, b-, c-, and mesomorphic or smectic form [2][3][4][5][6][7][8][9][10]. The a form is the primary form of polypropylene obtained under normal processing conditions [2][3][4][5][6]; however, the b-crystal is perhaps the most interesting crystalline phase for certain applications because of its hardness and impact resistance [2][3][4][5][6][8][9][10][11][12][13][14][15]. Therefore, different nucleating agents have been used to promote this type of crystal in iPP composites.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

et al. 2015

View full text Add to dashboard Cite

Functionalized titanium dioxide (TiO 2 ) nanospheres with pimelic acid (TiO 2 -PA) were synthesized through a novel and effective route, where the goal was to promote a high percentage of b-crystal into a matrix of isotactic polypropylene (iPP) by the use of low amount of nucleating agent. The successful chemical attachment of pimelic acid onto the TiO 2 surface was indicated by the presence of a new band at 1575 cm -1 and an increase in the thermal stability of the PA of approximately 200°C, which were observed through infrared spectra and thermogravimetric techniques, respectively. The iPP nanocomposite was analyzed by differential scanning calorimetry and wide-angle X-ray diffraction in order to identify b-crystals. An exothermic peak at 152°C and a diffraction peak at 2h = 16.2°confirmed the ability of the TiO 2 -PA nanoparticles to promote the b-crystal phase in the iPP nanocomposite even at low percentages (0.1 % w/w).About 85 % of b-crystal content was promoted with the TiO 2 -PA particles, that was significantly higher than the 25 % obtained by unmodified TiO 2 particles. Moreover, from visco-elastic analysis, it is evident that TiO 2 -PA particles help to improve the dissipation energy by effect of the promoted b-crystal phase in the polymer composites. Likewise, the AFM images provide evidence of the incompatibility of TiO 2 particles with the iPP matrix showing protruding reliefs in comparison with the homogeneous topography of the iPP/TiO 2 -PA composite. This results were confirmed by SEM, where the exclusion of TiO 2 particles was evident.

show abstract

Section: Waxd Measurements Of the Ipp Ipp/tio 2 And Ipp/ Tio 2 -Pamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

et al. 2015

View full text Add to dashboard Cite

show abstract

“…2-Pyridinecarboxylic acid, also known as picolinic acid, has a six-membered ring structure with two active groups: a carboxylic in the ortho-position to the nitrogen in the pyridine ring, therefore, the potential donor sites leads to a variety of ligation modes [1]. Picolinic acid is a natural compound that exhibits chelating properties which facilitates the absorption of minerals such as: chromium, zinc, magnesium, copper, iron, and probably molybdenum [2][3].…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques: TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS)

Nascimento

Parkes

Ashton

et al. 2018

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

Synthesis, characterization, thermal stability and pyrolysis of some alkaline earth picolinates M(C6H5NO2)2nH2O (where M = Mg(II), Ca(II), Sr(II) and Ba(II) and n = di (Mg), mono (Ca), hemi three (Sr) hydrated) were investigated using a range of techniques including simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), evolved gas analysis (EGA), differential scanning calorimetry (DSC), Hot-Stage microscopy (HSM), powder X-ray diffractometry (PXRD), complexometry with EDTA and elemental analysis (EA). The TG-DSC curves show that the hydrated compounds dehydrate in a single step of mass loss and the thermal stability of the anhydrous compound is little influenced from the atmosphere used. On the other hand, the mechanisms of thermal decomposition are profoundly influenced by the atmosphere used, as can also be observed in the EGA data. In addition, a comparison between two calorimetric techniques, Microwave Thermal Analysis (MWTA) and DSC, was made which showed similar profiles. Two evolved gas analysis (EGA) techniques: TG-DSC coupled to FTIR and HSM coupled to a quadrupole mass spectrometer (MS) were also used to provide additional information about the pyrolysis mechanism.

show abstract

“…In addition, the molecules in the nicotinic acid crystal are associated with the hydrogen bonds in zig zag chains being held together only by Vander Waals forces [12]. Aqueous Nicotinic acid is an amphiprotic system and its form coordination complexes with other materials to have better antitumor activity and pharmacological properties such as antibacterial, antioxidant and anti inflammatory and have been intensively studied [13][14][15][16][17][18]. Though the crystal structure of Pyridine 3-carboxylic acid was reported by W. B. Wrioht and G. S. D. Kilo [12], the elaborated analysis of characteristics and properties not available in the literature.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the optical, mechanical and magnetic properties of organic NLO single crystal: Pyridine 3-carboxylic acid

Deepa

Philominathan

2016

Optik

View full text Add to dashboard Cite

Crystal growth and physical characterization of picolinic acid cocrystallized with dicarboxylic acids

Cited by 20 publications

References 20 publications

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

Effective method for the synthesis of pimelic acid/TiO2 nanoparticles with a high capacity to nucleate β-crystals in isotactic polypropylene nanocomposites

Thermal analysis in oxidative and pyrolysis conditions of alkaline earth metals picolinates using the techniques: TG-DSC, DSC, MWTA, HSM and EGA (TG-DSC-FTIR and HSM-MS)

Investigation on the optical, mechanical and magnetic properties of organic NLO single crystal: Pyridine 3-carboxylic acid

Contact Info

Product

Resources

About