Mechanical properties, and glass transition

The appearance of glass transition at higher temperature for P-PSF in comparison with PSF was assigned to chains of reduced mobility. Another observation was relied to the increase of P transition temperature which could indicate that a higher energy barrier exists for molecular motions, caused by bulky structure of phosphorus containing side chain. 

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Table 5.3 Glass transition and mechanical properties of PLA plasticized with monomeric external plasticizers. 

Nakafuku C and Takehisa S-Y. (2004) Glass transition and mechanical properties of PLLA and PDLLA-PGA copolymer blends. Journal of Applied Polymer Science, 93 2164-2173. 

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