Synthesis of poly(hydroxymethylene-co-ethylene) by hydrogenation of the ethylene and carbon monoxide copolymer obtained by radical initiator with Ru/α-alumina and oxygen gas permeability
✍ Scribed by Katsuhiko Takaya; Chihiro Itoh; Yoshiro Uunno
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 240 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0887-624X
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✦ Synopsis
A new polymer (polyalcohol) was synthesized by hydrogenation of an ethylene carbon monoxide (CO) copolymer produced by a radical method with a catalyst and H 2 . The Ru/a-alumina catalyst systems showed an excellent activity for hydrogenation of the radical copolymer of CH 2 |CH 2 and CO. Films prepared by melting and pressing the synthesized polyalcohol had a high gas barrier property and high tensile modulus. This new polymer has hydroxymethylenic units [{CH(OH){ ] and ethylenic units [{CH 2 CH 2 {] in its molecular structure. The new functional polymer poly(hydroxymethylene-co-ethylene), {[{CH(OH){ ] n [{CH 2 CH 2 {] m {, is amorphous and has excellent and important properties as a high oxygen gas barrier film for wrapping and storage. This may be attributed to the new structure of poly(hydroxymethylene-co-ethylene) (PHME as an IUPAC name), or ethylene methine alcohol copolymer (EMOH as a generic name), compared to the other ethylene vinyl alcohol copolymer (EVOH as a generic name), {[{CH 2 CH 2 {] m {[{CH 2 CH(OH){ ] n {, which is used as one of the highest gas barrier polymers.