Synthesis and characterization of a novel terephthalate-bridged ladderlike polymethylsiloxane

✍ Scribed by Chunqing Liu; Zhihua Liu; Yang Liu; Ping Xie; Rongben Zhang

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 123 KB
• Volume: 49
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/1097-0126(200012)49:12<1658::aid-pi587>3.0.co;2-m

✦ Synopsis

A novel soluble terephthalate-bridged ladderlike polymethylsiloxane was synthesized successfully by stepwise coupling polymerization in three steps, including hydrosilylation coupling, hydrolysis and polycondensation. The bis(3-methyldichlorosilylpropyl) terephthalate monomer was ®rst synthesized by hydrosilylation reaction in the presence of dicyclopentadienylplatinum(II) chloride (Cp 2 PtCl 2 ) catalyst. The structures of the monomer and the polymer were characterized by FTIR, 1 H NMR, 13 C NMR and 29 Si NMR spectroscopy, mass spectrometry, X-ray diffraction, differential scanning calorimetry, vapour pressure osmometry and gel permeation chromatography. Characterization data indicate that the synthesized polymer possesses an ordered ladderlike structure.