Journal
MATERIALS LETTERS
Volume 128, Issue -, Pages 267-270Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.04.132
Keywords
Crosslinking; Dielectrics; Polymers; Thermal properties
Funding
- National Natural Science Foundation of China [51173021, 51373028]
- 863 National Major Program of High Technology [2012AA03A212]
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A series of polyarylene ether nitrite terminated with phthalonitrile (PEN-t-Ph) with different molecular weights have been prepared by adjusting the stoichiometric ratio of reaction. This novel PEN-t-Ph integrated the advantages of thermoplastic PEN resin and thermosetting phthalonitrile-based resin due to the crosslinking reaction of phthalonitrile (Ph) on the end of PEN-t-Ph chain. Therefore, PEN-t-Ph polymer can be fabricated using thermoplastic processing while being used in thermosetting fields. Thermal studies exhibited that the glass-transition temperatures of the various PEN-t-Ph crosslinked films were all above 209 degrees C, and were independent of the molecular weights of PEN-t-Ph. Besides, all the PEN-t-Ph crosslinked films possessed excellent thermostability with the 5 wt% weight loss temperatures all exceeding 518 degrees C. Dielectric measurement showed that the PEN-t-Ph with number-average molecular weight of 34,128 g mol(-1) presented the highest dielectric constant and lowest dielectric loss, paving the way for its application in electronic materials. (C) 2014 Elsevier B.V. All rights reserved.
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