OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy

| PUBLISHED BY SAS — AVAILABLE FROM SAS AND OSA

  • Vol. 55, Iss. 7 — Jul. 1, 2001
  • pp: 864–870

FT-NIR Spectroscopic Study of OH Groups in Ethylene-Vinyl Alcohol Copolymer

Reikichi Iwamoto, Shigetoshi Amiya, Yoichiro Saito, and Hideo Samura

Applied Spectroscopy, Vol. 55, Issue 7, pp. 864-870 (2001)


View Full Text Article

Acrobat PDF (239 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

In the present study we have demonstrated the unique capability of near-infrared/infrared (NIR/IR) spectroscopy to characterize the hydrogen bonding of the OH groups in ethylene-vinyl alcohol copolymer (EVOH). Fourier transform (FT)-NIR/IR spectroscopic measurements were made of EVOHs with ethylene contents of 33, 49, 75, and 89 mole %. A strong and broad absorption at ~4780 cm-1, which is the first combination of the OH stretching and deformation vibrations, is assigned to the aggregated OH groups. The band shows a shoulder at 4970 cm-1 at an ethylene content of 49 mole %, which becomes a distinct peak at a content of 89%. This feature is assigned to the free OH group isolated in the surroundings of the ethylene component. Existence of the free OH group is additionally evidenced by the appearance of sharp absorptions of the OH stretching fundamental at 3027 cm-1 and its first overtone at 7094 cm-1. The relative population of the free OH has been estimated as 0, 0.3, 1.5, and 3.9 mole % for ethylene content of 33, 49, 75, and 89, mole %, respectively.

Citation
Reikichi Iwamoto, Shigetoshi Amiya, Yoichiro Saito, and Hideo Samura, "FT-NIR Spectroscopic Study of OH Groups in Ethylene-Vinyl Alcohol Copolymer," Appl. Spectrosc. 55, 864-870 (2001)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-55-7-864

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited