The Relationship between Crystalline Melting Point and

Features of chemical structure that affect the degree of molecular freedom influence both the crystalline melting point and the glass transition temperature. Moreover, such features have roughly similar effects on both properties, so that the empirical rule has been found that for many polymers  

This rule of thumb does not apply to all polymers. For certain polymers, such as poly(propylene), the relationship is complicated because the value of itself is raised when some of the 

This part of the chapter has shown that the relationship between and T , is complicated. This relationship needs to considered separately for each polymer, but can be useful for gaining an insight into the morphology of particular semi-crystal-line polymers. 

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