Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 43, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202200022
Keywords
high refractive index; hydrosilylation; Piers-Rubinsztajn reaction; silicone elastomers; silicone polymers
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Funding
- Natural Sciences and Engineering Research Council of Canada
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The article discusses the incorporation of high refractive index compound BINOL into silicone polymer chains using the Piers-Rubinsztajn (PR) reaction. This method allows for the preparation of high refractive index linear copolymers and elastomers.
The high refractive index aromatic compound, binaphthol (BINOL), is readily incorporated into silicone polymer chains using the Piers-Rubinsztajn (PR) reaction; alternating and random linear copolymers, and elastomers are available. The highest refractive index (RI) materials are BINOL rich. It is not possible to directly make high refractive index linear polymers with very short HSi-capped, telechelic silicone chains, as they do not react cleanly. However, chain extending short vinyl-capped BINOL macromers with simple arylsilanes using hydrosilylation leads to polymers with a molar mass of up to 8000 and refractive indices of up to 1.58. Elastomers are prepared using similar processes. The reactions are facile to practice and suggest BINOL can be harnessed in these and other processes to augment RI.
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