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Preparation of positive‐temperature coefficient heaters using platinum‐catalyzed silicone rubber
Author(s) -
Park EunSoo,
Yun SungJin,
Kim GwangTae,
Park IllJoon,
Choi WonHyuck,
Jeong JiWoong,
Hong SungYoung,
Park HyunWoo,
Jang Lee Wook,
Yoon JinSan
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20107
Subject(s) - temperature coefficient , silicone rubber , reproducibility , materials science , composite material , electrical resistivity and conductivity , platinum , carbon black , natural rubber , acetylene , catalysis , chemistry , electrical engineering , chromatography , organic chemistry , engineering
Various output heaters were extruded with acetylene black–filled platinum‐catalyzed silicone rubber. The resistivity–temperature behavior of extruded heaters exhibited a positive‐temperature coefficient (PTC) effect without any negative‐temperature coefficient (NTC) effect. Resistivity and thermal reproducibility of the extruded heaters were investigated during heating and cooling cycles at an applied voltage of 220 V. These heaters initially showed poor reproducibility of resistivity during the repeated cycles and this effect increased significantly as the acetylene black content decreased. PTC effect and electrical reproducibility were improved significantly during the thermal ageing process. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1611–1617, 2004