scholarly journals Glassy State and Glass Transition-Its Elucidation and New Applications. II. Determination of Glass Transition Temperature by Differential Scanning Calorimetry.

1996 ◽  
Vol 53 (12) ◽  
pp. 866-868 ◽  
Author(s):  
Noritaka KIMURA ◽  
Keisuke AIZAWA ◽  
Yoshiyuki NISHIO ◽  
Hidematsu SUZUKI
1994 ◽  
Vol 49 (3-4) ◽  
pp. 273-275 ◽  
Author(s):  
Patricia Luque ◽  
Antonio Heredia

The existence of a glassy state in isolated tomato fruit cuticles was investigated using differential scanning calorimetry. Tomato fruit cuticular membranes showed a glass transition temperature at -30 °C and an additional second order transition temperature near 30 °C. Changes in these temperatures during fruit growth were also studied


2011 ◽  
Vol 21 (No. 5) ◽  
pp. 185-191 ◽  
Author(s):  
I. Šmídová ◽  
J. Čopíková ◽  
M. Maryška ◽  
M.A. Coimbra

The main purpose of the contribution presented here is the study of the glassy state and the presence of crystals in hard candies. Hard candies are non-chocolate sweets usually made of sucrose and glucose or of maltose syrup. They can also be made of alditols, used in sugar-free hard candies. In hard candies, carbohydrates or alditols are in amorphous state. Crystallisation in the glassy state of hard candies occurs as a result of a bad formulation, processing or storage and can be detrimental to the product quality. Differential scanning calorimetry was used to determine the glass transition temperature T<sub>g</sub> and the amount of crystals. Polarising microscopy was used to show the undesirable presence of crystals in samples of hard candies. The carbohydrates composition of the samples was determined by HPLC and the moisture content in each sample was evaluated by Karl Fisher method. &nbsp;


2013 ◽  
Vol 32 (8) ◽  
pp. 1368-1372 ◽  
Author(s):  
Lidong Feng ◽  
Xinchao Bian ◽  
Gao Li ◽  
Zhiming Chen ◽  
Yi Cui ◽  
...  

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nurul Fatahah Asyqin Zainal ◽  
Jean Marc Saiter ◽  
Suhaila Idayu Abdul Halim ◽  
Romain Lucas ◽  
Chin Han Chan

AbstractWe present an overview for the basic fundamental of thermal analysis, which is applicable for educational purposes, especially for lecturers at the universities, who may refer to the articles as the references to “teach” or to “lecture” to final year project students or young researchers who are working on their postgraduate projects. Description of basic instrumentation [i.e. differential scanning calorimetry (DSC) and thermogravimetry (TGA)] covers from what we should know about the instrument, calibration, baseline and samples’ signal. We also provide the step-by-step guides for the estimation of the glass transition temperature after DSC as well as examples and exercises are included, which are applicable for teaching activities. Glass transition temperature is an important property for commercial application of a polymeric material, e.g. packaging, automotive, etc. TGA is also highlighted where the analysis gives important thermal degradation information of a material to avoid sample decomposition during the DSC measurement. The step-by-step guides of the estimation of the activation energy after TGA based on Hoffman’s Arrhenius-like relationship are also provided.


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