Solvent‐induced crystallization of glassy syndiotactic polystyrene

Vibrational Spectroscopy Imaging in Polymers

“…It is of note that solvent diffusion was directly determined from spatially resolved FT-IR images. The observed value of D is in excellent agreement with the diffusion coefficient of liquid chloroform from mass uptake experiments by Vittoria et al [45]. It was rather remarkable that the diffusion coefficient of chloroform, when supplied in its gaseous form, is about the same as with a supply of liquid chloroform.…”

Competition between gelation and crystallization in solutions of syndiotactic polystyrene in cis-decalin

“…[3][4][5] Insolutionorafterabsorptionof solvent, the T 2 G 2 helix conformation can be formed. [1,6,7] Again, this conformation can also lead to two different modifications: the d-modification, formed in all solvents of good quality for polystyrene, and the g-modification, a solvent-free modification formed after heating the d to temperatures around120 8C. [3,6,[8][9][10] Thisconformationcan alsobe formed after structure formation in solutions of Y-solvents.…”

Effect of Compressed CO2 on Phase Transitions and Polymorphism in Syndiotactic Polystyrene

“…6,7 There are four types of crystalline form, R, , γ, and δ, and two types of mesomorphic form. Forms R and have T 4 conformation (zigzag chains) with an identity period of 5.1 Å, 1,8,9 γ and δ have T 2 G 2 conformation (s(2/1)2 helical chains) with an identity period of 7.7 Å, [10][11][12] while the mesomorphic form can have T 4 or T 2 G 2 conformation depending on the morphology of the starting material used.…”