Polymer Analysis Polymer Theory pp 1-54
Fractionation of Semicrystalline Polymers by Crystallization Analysis Fractionationand Temperature Rising Elution Fractionation
Crystallization analysis fractionation (Crystaf) and temperature rising elution fractionation (Tref) are analytical techniques for determining the distribution of chain crystallizabilities of semicrystalline polymers. These techniques fractionate polymer chains on the basis of the differences in their chain microstructures that affect their crystallizabilities in dilute solutions. Both techniques can be used to estimate the chemical composition distribution of copolymers and the tacticity distribution of homopolymers. This information is crucial for understanding polymerization mechanisms and constructing structure--property relationships. This review covers the theoretical aspects of both techniques, describes their basic operation procedures and applications, and discusses the mathematical models proposed for Crystaf and Tref.
Analytical temperature rising elution fractionation
Average comonomer content
Chemical composition distribution
Crystallization analysis fractionation
Differential scanning calorimetry
Fourier transform IR
Linear low-density polyethylene
Molecular weight distribution
Preparative temperature rising elution fractionation
Successive solution fractionation
Temperature rising elution fractionation
Temperature difference between Crystaf peak temperatures
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