POLY-P-XYLYLENE
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POLY-P-XYLYLENE 속성
- 녹는점
- 403-409 °C
안전
POLY-P-XYLYLENE C화학적 특성, 용도, 생산
화학적 성질
The most significant property of poly-p-xylylene is its thermal stability. The crystalline melting point is 375-425°C and in an inert atmosphere the material is claimed to have a useful life of 10 years at 220°C. The thermal stability in air is not exceptional. Poly-p-xylylene also maintains useful properties at temperatures as low as - 200°C. The polymer has outstandingly good electrical insulation characteristics and is used as a dielectric in special capacitors.It may be noted that poly-p-xylylene is considerably less stable than polyp- phenylene owing to the presence of the relatively weak dibenzyllinkages. It may also be noted that the isomeric polyxylylenes have been prepared but poly-o-xylylene has a polymer melt temperature of 110°C whilst poly-mxylylene has a softening temperature of only 60°C; these polymers are therefore of no immediate interest.
제조 방법
When di-p-xylylene is pyrolysed, both methylene bridges are homolytically cleaved to give the reactive intermediate p-xylylene which spontaneously forms the linear polymer on cooling. Generally, the polymer is deposited (in the polymerization chamber) on to a cold condenser and then removed as film; alternatively, the polymer is deposited directly on to an object which is required to be coated. Typically, an average molecular weight of about 500000 is attained.POLY-P-XYLYLENE 준비 용품 및 원자재
원자재
준비 용품
POLY-P-XYLYLENE 공급 업체
글로벌( 6)공급 업체
공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
---|---|---|---|---|---|
Dayang Chem (Hangzhou) Co.,Ltd. | 571-88938639 +8617705817739 |
info@dycnchem.com | CHINA | 52867 | 58 |
GIHI CHEMICALS CO.,LIMITED | +8618058761490 |
info@gihichemicals.com | China | 49999 | 58 |
POLY-P-XYLYLENE 관련 검색:
알루미늄 아세틸아세토네이트 코발트(II) 아세틸아세토네이트 하이드레이트 아세틸아세톤산 구리 디스프로슘 트리(2,2,6,6-테트라메틸-3,5-헵탄디오네이트) 아세틸아세토산 제2철 실버 아세틸아세토네이트
SALCOMINE
Tosylmethyl isocyanide
TERT-BUTYL ISOCYANIDE
DICHLORO(ETHYLENEDIAMINE)PLATINUM(II)
METHYL ISOCYANOACETATE
N-BUTYLISOCYANIDE
Benzyl isocyanide
Ethyl isocyanoacetate
TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO)EUROPIUM(III)
PHENYLSELENOL
Tris(2,4-pentanedionato)chroMiuM(III)
1,1,3,3-TETRAMETHYLBUTYL ISOCYANIDE