Poly(propylene isophthalate), poly(propylene succinate), and their random copolymers: Synthesis and thermal properties

✍ Scribed by M. Soccio; L. Finelli; N. Lotti; M. Gazzano; A. Munari

• Book ID: 105338516
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 199 KB
• Volume: 45
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/polb.21049

✦ Synopsis

Abstract

Poly(propylene isophthalate) (PPI), poly(propylene succinate) (PPS), and poly(propylene isophthalate/succinate) (PPI‐PPS) random copolymers were synthesized and characterized in terms of chemical structure and molecular weight. The thermal behavior was examined by TGA and DSC. All the polymers showed a good thermal stability. At room temperature, they appeared as semicrystalline materials, except 20PPI‐PPS and 30PPI‐PPS: the main effect of copolymerization was a lowering in the amount of crystallinity and a decrease of T~m~ with respect to homopolymers. A crystalline phase of PPI and PPS was evidenced at high content of PI or PS units, respectively. Amorphous samples were obtained after melt quenching and an increment of T~g~, with the increment of PI units, was observed. This behavior was explained as due to the presence of stiff phenylene groups. The Wood equation described well T~g~‐composition data. Lastly, the presence of a rigid‐amorphous phase was evidenced in copolymers, differently from the two homopolymers. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 310–321, 2007.