Search National Agricultural Library Digital Collections

NALDC Record Details:

Preparation of Soybean Oil Polymers with High Molecular Weight

Permanent URL:
http://handle.nal.usda.gov/10113/49245
File:
Download [PDF File]
Abstract:
The cationic polymerization of soybean oils was initiated by boron trifluoride diethyl etherate in supercritical carbon dioxide medium. The resulting polymers had molecular weight ranging from 21,842 to 118,300 g/mol. Nuclear magnetic resonance spectroscopy and gel permeation chromatography analysis confirmed the polymerization had occurred. Parameters affecting the polymerization were studied, which included initiator amount and reaction time. Results show that the longer reaction time, up to 3 h, favored the higher molecular weight of polymers at conditions of 140 °C and initiator BF₃·OEt₂ (2.5 g, 0.018 mol). When reaction time was increased further, the molecular weight of polymers stayed the same or slightly decreased. Increased concentration of initiator gave the higher molecular weight of polymers. The high molecular weight polymers were possibly formed through two path ways: polymerization and intermolecular Diels-Alder reaction.
Author(s):
Liu, Zengshe , Erhan, Sevim Z.
Subject(s):
soybean oil , biopolymers , biobased products , polymerization , chemical reactions
Format:
p. 243-249.
Note:
Includes references
Source:
Journal of polymers and the environment 2010 Sept., v. 18, no. 3
Language:
English
Publisher:
Boston : Springer US
Year:
2010
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.