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Synthesis and properties of germanium-containing poly(diphenylacetylenes)

✍ Scribed by Hidehiro Ito; Toshio Masuda; Toshinobu Higashimura

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 344 KB
Volume: 34
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(199610)34:14<2925::aid-pola9>3.0.co;2-p

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✦ Synopsis

SYNOPSIS

l-Phenyl-2-[rn-(trimethylgermyl)phenyl]acetylene (m-Me,GeDPA) and 1-phenyl-2-[p-(trimethylgermyl)phenyl]acetylene @-Me,GeDPA) polymerized with TaC1,-cocatalyst systems t o provide in high yields new polymers having weight-average molecular weights over 1 X lo6. Poly(m-Me3GeDPA) was a yellow solid, which completely dissolved in toluene, chloroform, etc., t o form a tough film by solution casting. Poly@-Me,GeDPA) was also a yellow solid and partly insoluble in any solvents. T h e onset temperatures of weight loss for these polymers in the thermogravimetric analysis in air were a s high as ca. 40OoC. T h e oxygen permeability coefficient of poly(rn-Me,GeDPA) was 1100 barrers (25"C), which is about twice t h a t of poly(dimethylsi1oxane).

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