Hydrogen-Bonding-Directed Template Synthesis of Novel Stereo-Regular Organo-Bridged Ladder-Like Polymethylsiloxane

✍ Scribed by Huadong Tang; Jin Sun; Xiaoshu Zhou; Pengfei Fu; Ping Xie; Rongben Zhang

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 149 KB
• Volume: 204
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200290065

✦ Synopsis

Abstract

A novel stereo‐regular organo‐bridged ladder‐like polymethylsiloxane (LPMS) was synthesized by a stepwise coupling polymerization on the basis of an amido H‐bonding‐assisted self‐assembling template. The monomer N,N′‐bis{4‐[3‐(diethoxymethylsilyl)propoxy]‐phenyl}terephthalamide (M), prepared by hydrosilylation reaction at high temperature, was hydrolyzed in a dilute solution at a low temperature to form a ladder‐like supramolecular intermediate through amido H‐bonding interactions, which was further condensed to form the polymer LPMS. A combination of techniques including ^1^H NMR, ^29^Si NMR, and FT‐IR spectroscopies X‐ray diffraction (XRD), and differential scanning calorimetry (DSC) were used to characterize the titled polymer LPMS, and the results indicate that the polymer possesses an ordered ladder‐like structure.

^29^Si NMR spectrum of the polymer LPMS.

magnified image^29^Si NMR spectrum of the polymer LPMS.