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Polymer Classification: Crystallinity

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...

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Related Experiment Video

Updated: Jun 16, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Holographic interferometric microscopy of polymer crystallization.

|February 6, 2010

Summary

Holographic interference microscopy effectively studies polymer crystallization. Both double-exposure holograms and simultaneous wavefront reconstruction are essential for analyzing optical path changes and polymer melt morphology.

Area of Science:

Polymer Science
Optical Physics
Materials Science

Background:

Polymer crystallization from the melt is a complex process.
Understanding secondary crystallization and melt morphology is crucial for material properties.
Traditional microscopy methods have limitations in characterizing these phenomena.

Purpose of the Study:

To describe the application of holographic interference microscopy to polymer melt crystallization.
To evaluate the suitability of two specific holographic interferometric techniques.
To establish the feasibility of these methods for studying secondary crystallization and morphological boundaries.

Main Methods:

Utilized holographic interference microscopy.
Employed double-exposure holography.

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Last Updated: Jun 16, 2026

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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

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Applied simultaneous wavefront reconstruction from two separate holograms.

Main Results:

Both double-exposure holography and simultaneous wavefront reconstruction are essential techniques.
These methods allow for the initial evaluation of the origin and magnitude of optical path changes.
Demonstrated the feasibility of holographic interferometry for polymer melt studies.

Conclusions:

Holographic interference microscopy is a viable method for studying polymer crystallization.
The combined use of double-exposure holography and simultaneous wavefront reconstruction is necessary for comprehensive analysis.
This approach enables detailed characterization of secondary crystallization and morphological boundaries in polymer melts.