Effects of polydispersity on the phase coexistence diagrams in multiblock copolymers with Laser block length distribution

✍ Scribed by M. Foroutan; M.A. Jafarizadeh

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 279 KB
• Volume: 329
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/s0378-4371(03)00633-2

✦ Synopsis

Phase behavior of AB-multiblock copolymer melts which consists of chains with laser distribution of A and B blocks have been investigated in the framework of the mean-ÿeld theory, where the polydispersity of copolymer is a function of two parameters K and M . The in uence of the Laser distribution on higher-order correlation functions (up to sixth order) are computed for various values of K and M , and their contributions on the phase diagrams and phase coexistence are presented. It is shown that, with increasing polydispersity (decreasing K and increasing M ) the transition lines of all phases shift upwards, consequently polydispersity destabilize the system.