LU Xin-ya, JIANG Bing-zheng. RELATIONSHIP BETWEEN GLASS TRANSITION TEMPERA TURE AND MOLECULAR PARAMETERS OF POLYMERS[J]. Acta Polymerica Sinica, 1990,(6):647-654.
LU Xin-ya, JIANG Bing-zheng. RELATIONSHIP BETWEEN GLASS TRANSITION TEMPERA TURE AND MOLECULAR PARAMETERS OF POLYMERS[J]. Acta Polymerica Sinica, 1990,(6):647-654.DOI:
The glass transition temperature (Tg) and unperturbed demensions of PMMAs with Bernoulli distribution of stereoregular diads were measured. It was found that T
of PMMA depends not only on their tacticity but also on the distfibution type of the diads. Therefore
the linearized equation representing the dependence of Tg on the content of iso-
syndic- and heterotriads can only be used for the PMMA with the same type of stereodiads distribution.The theoretical relationship proposed in our previous papei; was applied to analyse the data of Tg and unperturbed dimension for PMMAs having various tacticities. The temperature coefficients
dlnσ2/dT
calculated by this method show a good agreement with the experimental ones.