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High stability poly(N-adamantyl-exo-norbornene-5,6-dicarboximide) and phenyl vinylene thiophene electro-optic host-guest system.

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Title: High stability poly(N-adamantyl-exo-norbornene-5,6-dicarboximide) and phenyl vinylene thiophene electro-optic host-guest system.
Authors: Spring, Andrew M.1, Qiu, Feng1, Yokoyama, Shiyoshi1 s_yokoyama@cm.kyushu-u.ac.jp
Source: European Polymer Journal. Nov2016, Vol. 84, p89-99. 11p.
Subjects: Host-guest chemistry, Polythiophenes, Electrooptics, Chemical stability, Ring-opening polymerization, Metathesis reactions, Molecular weights
Abstract: Poly(N-adamantyl- exo -norbornene-5,6-dicarboximide) was prepared by ring opening metathesis polymerization. This was achieved in chloroform using the Grubbs 1st generation initiator and quenched with ethyl vinyl ether. The polymer had a weight average molecular weight of 27,000 g/mol with a polydispersity index of 2.19, a high glass transition temperature of 281 °C and a high thermal decomposition temperature of 385 °C (10% loss). The trans : cis vinylene ratio was 1.00:0.19 making the polymer amorphous. The polymer was used as a host for 5 guest nonlinear optical chromophores. The relationship between the chromophore structure and the electro-optic coefficient was investigated. A range of chromophore concentrations were evaluated and it was found that the ideal chromophore structure included a bulky tert -butyldiphenylsilane side group. A maximum r 33 of 80 pm/V was obtained at a chromophore concentration of 45 wt% and a poling temperature of 160 °C. A host-guest system containing 35 wt% of the tert -butyldiphenylsilane substituted chromophore had a stability of 85% at a temperature of 85 °C for 500 h. The stability at 105 °C was 72%. In comparison amorphous polycarbonate under the same conditions achieved a stability of just 58% at 85 °C, while poly(methyl methacrylate) had a stability of 0% at 85 °C. [ABSTRACT FROM AUTHOR]
Copyright of European Polymer Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Data: High stability poly(N-adamantyl-exo-norbornene-5,6-dicarboximide) and phenyl vinylene thiophene electro-optic host-guest system.
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  Data: <searchLink fieldCode="AR" term="%22Spring%2C+Andrew+M%2E%22">Spring, Andrew M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Qiu%2C+Feng%22">Qiu, Feng</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yokoyama%2C+Shiyoshi%22">Yokoyama, Shiyoshi</searchLink><relatesTo>1</relatesTo><i> s_yokoyama@cm.kyushu-u.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22European+Polymer+Journal%22">European Polymer Journal</searchLink>. Nov2016, Vol. 84, p89-99. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Host-guest+chemistry%22">Host-guest chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Polythiophenes%22">Polythiophenes</searchLink><br /><searchLink fieldCode="DE" term="%22Electrooptics%22">Electrooptics</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+stability%22">Chemical stability</searchLink><br /><searchLink fieldCode="DE" term="%22Ring-opening+polymerization%22">Ring-opening polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Metathesis+reactions%22">Metathesis reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+weights%22">Molecular weights</searchLink>
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  Data: Poly(N-adamantyl- exo -norbornene-5,6-dicarboximide) was prepared by ring opening metathesis polymerization. This was achieved in chloroform using the Grubbs 1st generation initiator and quenched with ethyl vinyl ether. The polymer had a weight average molecular weight of 27,000 g/mol with a polydispersity index of 2.19, a high glass transition temperature of 281 °C and a high thermal decomposition temperature of 385 °C (10% loss). The trans : cis vinylene ratio was 1.00:0.19 making the polymer amorphous. The polymer was used as a host for 5 guest nonlinear optical chromophores. The relationship between the chromophore structure and the electro-optic coefficient was investigated. A range of chromophore concentrations were evaluated and it was found that the ideal chromophore structure included a bulky tert -butyldiphenylsilane side group. A maximum r 33 of 80 pm/V was obtained at a chromophore concentration of 45 wt% and a poling temperature of 160 °C. A host-guest system containing 35 wt% of the tert -butyldiphenylsilane substituted chromophore had a stability of 85% at a temperature of 85 °C for 500 h. The stability at 105 °C was 72%. In comparison amorphous polycarbonate under the same conditions achieved a stability of just 58% at 85 °C, while poly(methyl methacrylate) had a stability of 0% at 85 °C. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of European Polymer Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.eurpolymj.2016.09.012
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        Text: English
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      – SubjectFull: Polythiophenes
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      – SubjectFull: Electrooptics
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      – SubjectFull: Chemical stability
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      – SubjectFull: Ring-opening polymerization
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      – TitleFull: High stability poly(N-adamantyl-exo-norbornene-5,6-dicarboximide) and phenyl vinylene thiophene electro-optic host-guest system.
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              Text: Nov2016
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