What question did this study set out to answer?

To examine the relationship between glass transition temperature and melting point across a wide range of polymers, testing whether molecular symmetry or crystal structure governs this ratio.

January 1, 1970British Polymer Journal

Ratio of the glass transition temperature to the melting point in polymers

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Authors

WLW. A. Lee GKG. J. KnightBuilding Research Establishment

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Implication

Comparative analysis finds overlapping glass-to-melting temperature ratios across 132 polymers, indicating that molecular symmetry does not sharply dictate thermal transition behavior.

Key Points

To examine the relationship between glass transition temperature and melting point across a wide range of polymers, testing whether molecular symmetry or crystal structure governs this ratio.
Analyzed the ratio of glass transition temperature to melting point across 132 polymers (N=132).
Calculated arithmetic means and standard deviations to compare symmetrical versus unsymmetrical polymer structures and evaluated associations with crystalline form.
The arithmetic mean ratio was 0.63 for symmetrical polymers and 0.69 for unsymmetrical polymers, with a combined standard deviation of 0.11.
No sharp boundary separated the ratios of symmetrical and unsymmetrical polymers, contrasting with earlier reports based on smaller sample sizes.
No correlation was observed between the transition temperature ratios and polymer crystalline forms.

Cite This Study

Lee et al. (1970) studied this question.

synapsesocial.com/papers/6a0cbe2bed9ffa0cbfaddd22 https://doi.org/10.1002/pi.4980020112

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Implication

Comparative analysis finds overlapping glass-to-melting temperature ratios across 132 polymers, indicating that molecular symmetry does not sharply dictate thermal transition behavior.

Ratio of the glass transition temperature to the melting point in polymers

Discussion

Member takes

Implication

Key Points

Cite This Study

Ratio of the glass transition temperature to the melting point in polymers

Discussion

Member takes

Implication

Key Points

Cite This Study

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