Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers
The high molecular weight biphenyl-based polyarylene ether nitrile copolymers were synthesized by nucleophilic substitution reaction of 2,6-dichlorobenzonitrile (DCBN) with varying molar ratios of 4,4’-dihydroxybiphenyl (BP) and hydroquinone (HQ). The BP content of the copolymers has influence on gl...
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| Language: | English |
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Budapest University of Technology and Economics
2007-08-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0000286&mi=cd |
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| description | The high molecular weight biphenyl-based polyarylene ether nitrile copolymers were synthesized by nucleophilic substitution reaction of 2,6-dichlorobenzonitrile (DCBN) with varying molar ratios of 4,4’-dihydroxybiphenyl (BP) and hydroquinone (HQ). The BP content of the copolymers has influence on glass transition temperature (Tg), initial decomposition temperature (Tid), mechanical properties and the crystallinity. All the copolymers could be dissolved in NMP, DMF and DMAc on heating, and were stable up to 450°C with a high char yield above 50% at 800°C in nitrogen atmosphere. The glass transition temperature, the melting temperature and tensile strength of copolymers were found to increase with increase in concentration of the BP units in the polymer. The dynamical viscosity and the storage modulus have been influenced by the BP concentration, frequency, temperature and time. This rheological results show that these copolymers have best thermoplastic processability and stability at 300–400°C. |
| format | Article |
| id | doaj-art-6c6f1736b58848b4b1cdd1992ee96d97 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2007-08-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-6c6f1736b58848b4b1cdd1992ee96d972025-08-20T03:33:39ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2007-08-011849950510.3144/expresspolymlett.2007.71Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymersThe high molecular weight biphenyl-based polyarylene ether nitrile copolymers were synthesized by nucleophilic substitution reaction of 2,6-dichlorobenzonitrile (DCBN) with varying molar ratios of 4,4’-dihydroxybiphenyl (BP) and hydroquinone (HQ). The BP content of the copolymers has influence on glass transition temperature (Tg), initial decomposition temperature (Tid), mechanical properties and the crystallinity. All the copolymers could be dissolved in NMP, DMF and DMAc on heating, and were stable up to 450°C with a high char yield above 50% at 800°C in nitrogen atmosphere. The glass transition temperature, the melting temperature and tensile strength of copolymers were found to increase with increase in concentration of the BP units in the polymer. The dynamical viscosity and the storage modulus have been influenced by the BP concentration, frequency, temperature and time. This rheological results show that these copolymers have best thermoplastic processability and stability at 300–400°C.http://www.expresspolymlett.com/letolt.php?file=EPL-0000286&mi=cdPolymer synthesis, molecular ethermal propertiesrheologymechanical peopertiesPolyarylene ether nitrile copo |
| spellingShingle | Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers eXPRESS Polymer Letters Polymer synthesis, molecular e thermal properties rheology mechanical peoperties Polyarylene ether nitrile copo |
| title | Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers |
| title_full | Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers |
| title_fullStr | Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers |
| title_full_unstemmed | Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers |
| title_short | Synthesis, characterization and rheological property of biphenyl-based polyarylene ether nitrile copolymers |
| title_sort | synthesis characterization and rheological property of biphenyl based polyarylene ether nitrile copolymers |
| topic | Polymer synthesis, molecular e thermal properties rheology mechanical peoperties Polyarylene ether nitrile copo |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0000286&mi=cd |