Development of Ni particle dispersed poly(methylmethacrylate) composites exhibiting conductor/insulator transition by the positive temperature coefficient effect of electrical resistivity

Autor:	Yousuke Goto, Seiji Takahashi, Masashi Yamamoto, Hajime Nakano, Akihiko Kono, Katsuya Shimizu, Toshiaki Ougizawa, Hideo Horibe
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Composite number Insulator (electricity) Polymer Conductor Poly methylmethacrylate chemistry Electrical resistivity and conductivity Materials Chemistry Composite material Electrical conductor Temperature coefficient
Zdroj:	Polymer Journal. 45:690-694
ISSN:	1349-0540 0032-3896
DOI:	10.1038/pj.2012.223
Popis:	In this paper, we have provided the first conclusive evidence that the Ni particle dispersed poly(methylmethacrylate) (PMMA) composites, which do not exhibit melting phenomenon, exhibit the positive temperature coefficient (PTC) effect when Ni content were 20 and 25vol.%. In particular, the composite with Ni content of 25vol.% exhibited PTC effect comparable to that of composites composed of crystalline polymer, and it demonstrated conductor/insulator transition. We assumed that these composites have few conductive paths, and so disconnection of conductive path occurred from slight volume expansion of PMMA by temperature rising.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5da30030416d260fb446f5e27c25bddd https://doi.org/10.1038/pj.2012.223 Zobrazit plný text záznamu