By Serban C. Moldoveanu
Analytical Pyrolysis of man-made natural Polymers is a follow-up to Analytical Pyrolysis of average natural Polymers, that's quantity 20 of the sequence. the main target of the e-book is on useful purposes of analytical pyrolysis in artificial natural polymer id and characterization.
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Additional info for Analytical Pyrolysis Of Synthetic Organic Polymers
In DSC the sample and the reference are heated separately at constant temperatures while the difference in energy AQ required to obtain the same temperature is measured. The plot of the derivative dAQ/dt (where t is time) as a function of temperature T allows the detection of endothermic and exothermic processes similar to DTA. The change in the slope of the graph indicates glass transition, an exothermic process may indicate crystallization or an exothermic reaction, an endothermic process may indicate melting, vaporization, etc.
A separate subclass of polymers with unsaturated carbon chain backbone is formed by polyacetylene. - Polymers with aromatic hydrocarbon backbone include polymers containing in their chain aromatic hydrocarbon rings, or alternating aromatic rings and aliphatic carbon groups. Thermosetting phenolic resins can be included in this class. - Polymers containing ether groups in the backbone include two subclasses, namely true polyethers and polyacetals. Polyethers such as polyethylene glycol [-O-CH2-CH2-]n having higher polarity compared to polyhydrocarbons are used for many practical applications where some hydrophilic character is necessary.
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