Chemistry Reference
In-Depth Information
3.2 Materials
Soybean oil (SO-5) was purchased from Purdue Farms Inc., Refined Oil
Division, (Salisbury, MD). ESO was obtained from Elf Atochem Inc.
(Philadelphia, PA) and used as received. The euphorbia seeds (51% oil
content) were provided by Dr Richard Roseberg, Oregon State University. The
oil from the seeds was extracted using a hydraulic press (Model 3851, Carver,
Inc., Wabash, IN) fitted with cage equipment (Carver Catalog No. 2094).
Purified and redistilled BF
3
OEt
2
, was obtained from Sigma-Aldrich
(St. Louis, MO). Sodium hydroxide (97.5%) was obtained from Fisher
Scientific (Fair Lawn, NJ), and potassium hydroxide (ACS reagent, 88.3%)
was obtained from J. T. Baker (Phillipsburg, NJ). Triethanolamine (98%) was
obtained from Sigma-Aldrich. Deionized water was purified to a conductivity
of 18.3 MO for the preparation of aqueous polysoap solutions for surface and
interfacial tension measurements. Carbon dioxide (499.8%) was obtained
from Linde Gas LLC (Independence, OH). Sodium bicarbonate (certified ACS
grade) was obtained from Fisher Scientific (Fair Lawn, NJ).
3.3 Experimental
3.3.1 Polymerization Procedure in CO
2
Polymerization of plant oils was carried out in a 300 mL or 100 mL high-
pressure reactor. The reactor was a Parr (Moline, IL) 4560 mini benchtop
unit equipped with a Parr 4843 controller and thermocouple. A schematic
diagram of the experimental set-up is depicted in Scheme 3.1.
The reactor was attached to an Isco Model 260D high-pressure syringe
pump used to charge the reactor with CO
2
. In a typical experiment of the
MagneDrive stirrer
TI
PI
PI
C
atalyst injection
loop
600 cc or
300 cc reactor
CO
2
cylinder
Syringe pump
Temperature-
controlled heater
Scheme 3.1 A schematic diagram of the experimental set-up.
