Introduction:
Differential scanningcalorimetry (DSC) measures temperatures and heat flows corresponding to thermal
transitions in plastics. In this DSC analysis, the difference in the quantity
of heat required to raise the temperatures of a sample and a reference is
measured as a function of temperature. Both the sample and the reference are
maintained at nearly the same temperature throughout the study. DSC
measures endothermic and exothermic transitions as a function of temperature Normally, the DSC analysis and testing programs are designed to run
the entire study in a linear fashion.
DSC analysis of plastics
can give valuable insight into plastics under study. Plastic DSC analysis can be
used in the quality testing and inspection of plastic right from the incoming of
plastic raw material till up to the formation of the final product. Plastic DSC
testing can also be used in the identification of plastics, plastic mix up, or
regrind plastic analysis. DSC analysis can very well be used in the evaluation of
properties like melting point, crystallization temperature, etc. DSC analysis
can also be sued in contamination analysis of plastics. Conventional methods for identifying vulcanized
elastomers would not detect if, for example, Teflon or Nylon had been added.
Differential Scanning Calorimeter can also assist in the determination of
enthalpies, Glass Transition (Tg) and crosslink density.
APPLICATION :
Common usages of DSC include investigation,
selection, comparison, and end-use performance evaluation of materials in
research, quality control, and production applications. DSC is commonly
used to measure a variety of properties in both organic and inorganic
materials, from metals and simple compounds to polymers and pharmaceuticals.
The properties measured include:
1. DSC Analysis is used widely for
examining Plastic materials to determine their thermal transitions.
Important thermal transitions during plastic analysis include the glass
transition temperature, crystallization temperature, and melting temperature
2. DSC
Analysis can also be used to study thermal degradation of plastics using an approach
such as Oxidative Onset Temperature.
3. DSC An analysis curve can be used to calculate enthalpies of transitions.
4.
Differential scanning calorimeter can be used to measure a number of
characteristic properties of a plastic sample. Using this thermal analysis technique
it is possible to observe fusion and crystallization events as well as glass transition temperatures Tg. DSC can also be used to
study oxidation, as well as other chemical
reactions.
5.
Differential scanning calorimeter used for failure analysis of plastic.
Our team of engineers and
scientists can do DSC testing and analysis on your plastic samples and can help
you to obtain as much as information as possible related to its thermal
transitions. Our DSC Instruments are very advance and are equipped with robots
that can function 24 x 7. We can provide
you with following services
§ Glass transitions by DSC Analysis lab
services
§ Phase changes by DSC Analysis lab services
§ Melting Temperature by DSC Analysis lab
services
§ Crystallization by DSC Analysis lab services
§ Product stability by DSC Analysis lab
services
§ Cure/cure kinetics by DSC Analysis lab
services
§ Oxidative stability by DSC Analysis lab
services
§ Thermal Stability by DSC Analysis lab
services
§ Advanced DSC Lab Analysis of Rubbers and
Elastomers
§ DSC Analysis Lab Services from -80C to 500C
§ Heat capacity and heat of fusion measurements
Example - : A typical
example of DSC analysis of plastic to evaluate the effect of additives on the
melting point of plastics used in the manufacturing of pharma plastic product
was studied. The result and the thermogram is attached.
Result:-
melting to a liquid requires more heat flow
to the sample than a sample undergoing crystallization because of the
sample will absorb
heat as it undergoes the endothermic phase transition from a solid
to a liquid.
|
Melting
Point (0C)
|
166.240
C
|
The above DSC testing allowed our client to accurately
evaluate and monitor the minor melting point changes that were happening due to
the changes that they were making in their formulations.
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