Journal ArticleDOI
Physical aging in PLA through standard DSC and fast scanning calorimetry investigations
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TLDR
In this article, an increase of 80-90% has been observed in the enthalpy recovery by fast scanning calorimetry (FSC) investigations, which is related to the high cooling rates used by FSC.About:
This article is published in Thermochimica Acta.The article was published on 2017-02-10. It has received 43 citations till now. The article focuses on the topics: Differential scanning calorimetry & Calorimetry.read more
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Journal ArticleDOI
Understanding Glass through Differential Scanning Calorimetry
Qiuju Zheng,Yanfei Zhang,Maziar Montazerian,Ozgur Gulbiten,John C. Mauro,Edgar Dutra Zanotto,Yuanzheng Yue,Yuanzheng Yue,Yuanzheng Yue +8 more
TL;DR: A comprehensive review of the many applications of DSC in glass science with focus on glass transition, relaxation, polyamorphism, and crystallization phenomena is presented and recent advances in DSC characterization technology are emphasized.
Journal ArticleDOI
Contribution of the rigid amorphous fraction to physical ageing of semi-crystalline PLLA
TL;DR: In this article, the physical ageing of poly( l -lactic acid) (PLLA) samples crystallized in a wide temperature range is compared, through the analysis of the enthalpy relaxation, with the behavior of a completely amorphous sample, in the same undercooling conditions.
Journal ArticleDOI
Complex nonequilibrium dynamics of stacked polystyrene films deep in the glassy state
TL;DR: Investigation of the kinetics of enthalpy recovery in stacked glassy polystyrene (PS) films with thickness from 30 to 95 nm over a wide temperature range below the glass transition temperature shows that the time evolution toward equilibrium exhibits two mechanisms of recovery, in ways analogous to bulk PS.
Journal ArticleDOI
Experimental analysis of lateral thermal inhomogeneity of a specific chip-calorimeter sensor
TL;DR: In this paper, a chip sensor UFS 1 (Flash DSC1™, Mettler Toledo, Switzerland) was chosen as an example but the procedures described also hold for other sensors.
Journal ArticleDOI
Glass transition of anhydrous starch by fast scanning calorimetry
TL;DR: Thermal lag corrections based on the comparison of glass transition temperatures measured by means of differential and fast scanning calorimetry have been proposed and give an anhydrous amorphous starch glass transition temperature of 312±7°C.
References
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Journal ArticleDOI
Enthalpy relaxation and recovery in amorphous materials
TL;DR: The field of enthalpy relaxation is reviewed in this paper, where current phenomenologies for dealing with the non-linear and non-exponential character of relaxation are presented, and their successes and shortcomings are discussed.
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Physical aging of polymers
TL;DR: The general area of physical aging of polymers is reviewed in this article, where various phenomenological aspects are introduced and discussed in terms of bulk structural changes evidenced by dilatometric and calorimetric studies, and are compared with the wide variety of information available from microstructural investigations involving spectroscopic and scattering techniques.
Journal ArticleDOI
Structural relaxation in vitreous materials
Cornelius T. Moynihan,Pedro B. Macedo,C. J. Montrose,Prabhat K. Gupta,M. A. DeBolt,J. F. Dill,B. E. Dom,P. W. Drake,A. J. Easteal,P. B. Elterman,R. P. Moeller,H. Sasabe,J. A. Wilder +12 more
TL;DR: In this paper, the second derivatives of Gibbs free energy are defined for equilibrium liquid and glass, and the time dependence of liquid properties due to the structural relaxation is shown schematically for the isobaric response of enthalpy to temperature changes.
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Isobaric volume and enthalpy recovery of glasses. II. A transparent multiparameter theory
TL;DR: In this article, a multi-ordering parameter model for glass transition phenomena has been developed on the basis of nonequilibrium thermodynamics, where the departure from equilibrium is partitioned among the various ordering parameters, each of which is associated with a unique retardation time, giving rise to the well-known nonlinear effects observed in volume and enthalpy recovery.