Synthesis and Characterization of COPUAP

The COPUAP
was prepared via the reaction of synthesized p-CDEA
with 12% MDI loading. The chain-extension reaction
was carried out in a beaker equipped with a magnetic stirrer and an
alcohol thermometer (Figure S1). The p-CDEA was heated below 60 °C under agitation while
gradually adding MDI.^{30 (link)} After 30 min,^{32 (link),33 (link)} the COPUAP was cooled down at ambient temperature, and its viscosity
was evaluated using a DV3T viscometer (AMETEK Brookfield, Middleborough,
MA) at 25 ± 0.5 °C. The attainment of the torque ranging
from 30 to 40% was indicative of the completion of the prepolymerization
process.^{23 (link)}

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Hipulan L.N., Dingcong RG J.r., Estrada D.J., Dumancas G.G., Bondaug J.C., Alguno A.C., Bacosa H.P., Malaluan R.M, & Lubguban A.A. (2024). Development of High-Performance Coconut Oil-Based Rigid Polyurethane-Urea Foam: A Novel Sequential Amidation and Prepolymerization Process. ACS Omega, 9(11), 13112-13124.

Publication 2024

DV3T viscometer

Corresponding Organization : Mindanao State University – Iligan Institute of Technology

Other organizations : University of San Agustin, University of Scranton

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Variable analysis

independent variables

MDI loading

dependent variables

Viscosity of the COPUAP

control variables

Temperature (heated below 60 °C)
Agitation (magnetic stirrer)
Time (30 min)

controls

Positive control: Attainment of the torque ranging from 30 to 40% was indicative of the completion of the prepolymerization process.

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