The diffusion of CH2Cl2 into a and b cryst. forms of syndiotactic polystyrene contg. planar zig-zag chains and desorption of the solvent were studied, and the x-ray diffraction patterns of the cryst. forms were compared. In the presence of liq. CH2Cl2, b-form samples absorbed solvent only in the amorphous phase (£30 g solvent for 100 g polymer), whereas a-form samples absorbed £60 g solvent for 100 g polymer and their polymer-rich fraction was transformed into a clathrate.
Different Solvent Stability of the Crystalline Polymorphic Forms of Syndiotactic Polystyrene / M., Rapacciuolo; DE ROSA, Claudio; G., Guerra; Mensitieri, Giuseppe; A., Apicella; M. A., DEL NOBILE. - In: JOURNAL OF MATERIALS SCIENCE LETTERS. - ISSN 0261-8028. - STAMPA. - 10:18(1991), pp. 1084-1087. [10.1007/BF00720132]
Different Solvent Stability of the Crystalline Polymorphic Forms of Syndiotactic Polystyrene
DE ROSA, CLAUDIO;MENSITIERI, GIUSEPPE;
1991
Abstract
The diffusion of CH2Cl2 into a and b cryst. forms of syndiotactic polystyrene contg. planar zig-zag chains and desorption of the solvent were studied, and the x-ray diffraction patterns of the cryst. forms were compared. In the presence of liq. CH2Cl2, b-form samples absorbed solvent only in the amorphous phase (£30 g solvent for 100 g polymer), whereas a-form samples absorbed £60 g solvent for 100 g polymer and their polymer-rich fraction was transformed into a clathrate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
