Differential Scanning Calorimetric Studies

The melting temperature, crystallization temperature, glass transition temperature and degree of crystallinity (% ) can be characterized by differential 

The clay platelets, compatibilizer, and the type of compatibilizer significantly affect the melting and crystallization temperatures [15,21,28,58]. 

The crystallization temperature is increased to a greater extent when clay platelets are incorporated in PP. The compatibilizer also alters the crystallization temperature. PP-g-MA as compatibilizer leads to better 

To some extent the presence of compatibilizers has also decreased the crystallization temperature [15]. It indicates the inhibition of the crystallization by the addition of compatibilized clay platelets. The presence of compatibilizers in the layer spacing during intercalation may reduce the nucleation efficiency. The shielding effect of compatibilizers over the surface of the clay will avoid the direct contact. 

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Both thermogravimetric analysis and differential scanning calorimetric studies were carried out on modified and unmodified PPO samples. Table IV presents the weight losses and the glass transition temperatures of the most representative polymers. 

Williams, N. A. Differential scanning calorimetric studies on frozen cephalosporin l-solu-tions. Int. J. Pharm. 44 (1-3), p. 205-212, 1988... 

Liggins, J.R., F. Sherman, A.J. Mathews, and B.T. Nall. 1994. Differential scanning calorimetric study of the thermal unfolding transitions of yeast iso-1 and iso-2 cytochromes c and three composite isozymes. Biochemistry 33 9209-9219. 

Maneri, L.R. and P.S. Low. 1988. Structural stability of the erythrocyte anion transporter, band 3, in different lipid environments. A differential scanning calorimetric study. J Biol Chem 263 16170-16178. 

Conejero-Lara, F., J.M. Sanchez-Ruiz, P.L. Mateo, F.J. Burgos, J. Vendrell, and F.X. Aviles. 1991. Differential scanning calorimetric study of carboxypeptidase B, procarboxypeptidase B and its globular activation domain. Eur J Biochem 200 663-670. 

Poeti, G., Fanelli, E., and Braghetti, M. A differential scanning calorimetric study of some phenol derivatives, J. Therm. Ana . Cahrim., 24(2) 273-279, 1982. 

Yamasaki M, Yano H, Aoki K. Differential scanning calorimetric studies on bovine serum albumin II. Effects of neutral salts and urea. Int J Biol Macromol 1991 13(6) 322—328. 

The dielectric relaxation of bulk mixtures of poly(2jS-di-methylphenylene oxide) and atactic polystyrene has been measured as a function of sample composition, frequency, and temperature. The results are compared with earlier dynamic mechanical and (differential scanning) calorimetric studies of the same samples. It is concluded that the polymers are miscible but probably not at a segmental level. A detailed analysis suggests that the particular samples investigated may be considered in terms of a continuous phase-dispersed phase concept, in which the former is a PS-rich and the latter a PPO-rich material, except for the sample containing 75% PPO-25% PS in which the converse is postulated. 

Ablett S, Izzard MJ, Lillford PJ. Differential scanning calorimetric study of frozen sucrose and glycerol solutions. J Chem Soc Faraday Trans 1992 88 789-794. 

Williams, N.A. Differential scanning calorimetric studies on frozen... 

Patterson, G. H., and Riga, A. T. 1993. Factors Affecting Oxidation Properties in Differential Scanning Calorimetric Studies. Thermochim. Acta, 226, 201-210. 

McElhaney, R. N. Differential scanning calorimetric studies of lipid-protein interactions in model membrane systems. Biochimica et Biophysica acta 564 361-421, 1986. 

Lewis RNAH, Mak N, McElhaney RN. A differential scanning calorimetric study of the thermotropic phase behavior of model membranes composed of phosphatidylcholines containing linear saturated fatty acyl chains. Biochemistry 1987 26 6118-6126. 

Shelter E, Cheng KC. Drug-polyvinylpyrrolidone (PVP) dispersions. A differential scanning calorimetric study. Int J Pharm 1980 6 179-182. 

Howell, B.K., Matthews, A.D., and Donnelly, A.P., Thermal stability of fish myofibrils a differential scanning calorimetric study, Int. J. Food Sci. Technol., 26, 283, 1991. 

McMullen, T., Lewis, R., and McElhaney, H.R. Differential scanning calorimetric study of the effect of cholesterol on the thermotropic phase behavior of a homologous series of linear saturated phosphatidylcholines. Biochemistry, 32, 516,1993. 

Keough KM. Kariel N. Differential scanning calorimetric studies of aqueous dispersions of phosphatidylcholines containing two polyenoic chains. Biochim Biophys Acta 1987 902 11-18. 

T Hatakeyama, S Hirose, H Hatakeyama. Differential scanning calorimetric studies on bound water in 1, 4-dioxane acidolysis lignin. Makomol 184 1265-1274, 1983. 

Ganguly S, Krishna Mohan V, Jyothi Bhasu VC, Mathews E, Adiseshaiah KS, Kumar AS. Surfactant-electrolyte interactions in concentrated water in oil emulsions. FT-IR spectroscopic and low-temperature differential scanning calorimetric studies. Colloids Surf 1992 65 243-256. 

Ravikumar, H. B., Ranganathaiah, C., Kumaraswamy, G. N., and Thomas, S., Positron annihilation and differential scanning calorimetric study of poly(trimethylene terephthalate)/EPDM blends. Polymer, 46, 2372-2380 (2005). 

Woike T, Zollner H et al (1990) Raman-spectroscopic and differential scanning calorimetric studies of the light induced metastable states in K2IKUQ5NO]. Solid State Commun... 

Differential scanning calorimetric studies have shown that Nafion contains at least three types of water—one tightly bound to the ions, one weakly bound in the secondary hydration shell to the ion or another component of the fluorocarbon polymer (e.g., to the ether oxygens), and one free from strong interactions with ions or polymer chains. Thus, the K" " form of Nafion contains 3.8 water molecules per fixed ionic group in the primary hydration shell, 0.15 molecules as loosely bound water, and 3.8 water molecules as free water per each ionic group [49]. 

A differential scanning calorimetric study (unpublished) shows that ASG eliminates the phase transition of dipalmitoylphosphatidylcholine (DPPC) just as well, and at the same molar proportion, as cholesterol. SG affects the phase transition by broadening rather than eliminating it. 

Tsuji, H., Hyon, S.-H., Ikada, Y., 1991. Stereocomplex formation between enantiomeric poly(lactic acid)s. 4. Differential scanning calorimetric studies on precipitates from mixed solutions of poly(D-lactic acid) and poly(L-lactic acid). Macromolecules 24, 5657-5662. 

Donovan, J. W., and Beardslee, R. A. (1975). Heat stabilization produced by protein-protein association. A differential scanning calorimetric study of the trypsin-soybean trypsin inhibitor and trypsin-ovomucoid complexes. J. Biol. Chem. 

Zahniey, J. C. (1981). Effects of manganese and calcium on conformational stability of concanavalln A a differential scanning calorimetric study. J. Inorg. Blochem. 15, 67-78. 

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