Abstract
AbstractNovel phenylacetylene (PA) monomers, which have o‐silylmethyl groups of different bulkinesses, i.e., o‐Me3SiCH2PA, o‐Et3SiCH2PA, and o‐t‐BuMe2Si‐CH2PA, polymerized with W and Mo catalysts in high yields. The MoCl5‐Ph4Sn catalyst achieved the highest weight‐average molecular weights (Mw 7 × 105 − 12 × 105), and the Mw increased as the ortho‐substitutent became bulkier (e.g., Mw of o‐t‐BuMe2SiCH2PA: 12 × 105). These monomers polymerized in a living fashion by the MoOCl4‐n‐Bu4Sn‐EtOH catalyst. The resulting polymers were soluble in common solvents such as toluene and chloroform. In the UV‐visible spectra, a tendency was observed that absorption maxima shifted to longer wavelengths as the substituents became bulkier. Membranes of the polymers were fairly permeable to gases (e.g., oxygen permeability coefficients 30‐80 barrers). Though o‐(Me3Si)2CHPA also polymerized with W and Mo catalysts, the product polymer was partly insoluble in any solvent. © 1995 John Wiley & Sons, Inc.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Polymer Science Part A: Polymer Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
