無触媒下におけるポリエチレンテレフタレートの反応押出による改質
Modification of Poly (ethylene terephthalate) by Reactive Extrusion without Catalyst
青木良幸・金城将人・倉持替宏・橋本和彦・伊保内 賢
Aoki, Yoshiyuki / Kinjo, Masato / Kuramochi, Tomohiro / Hashimoto, Kazuhiko / Ibonai, Masaru
We have investigated the chemical improvement of plastic materials by crosslinking reactions but not the physical one by blending of other polymers or reinforcing with glass fiber. The present article is concerned with the improvement of poly (ethylene telephthalate) (PET) by the crosslinking reactions with various types of multifunctional epoxy compounds in the absence of any catalyst. The reactions of PET with small amounts of epoxy compounds, such as 4,4'-diglycidyletherbisphenylmethane (DGEBF), tetraglycidyl-4,4'-diaminodiphenylmethane (TGDDM) and 4,4'-diglycidyletherbisphenylsulfone (DGEBS) were carried out in a single-screw extruder and cast into films. The PET film obtained after reactive extrusion in the presence of TGDDM (0.3〜0.4 phr) (crosslinking agents) showed good tensile strength (83MPa, cf. PET=72MPa) and good tensile impact strength (30kJ/m2 cf. PET=15kJ/m2). The thermal stability and chemical resistance were also improved.
Key words: Poly (ethylene terephthalate) / Mechanical property / Crosslinking reaction / Reactive extrusion