Fourier-Transform Infra Red (FTIR) Analysis of UV Curing Biobased-Polyurethane from Epoxidized Palm Oil Using Acrylation and Thiols Addition

Abstract

This study is conducted to synthesis bio-polyurethane from epoxidized palm oil (EPO). Palm oil-based polyurethane was synthesized by the acrylation process followed by thiols addition. The resulting oligomers were then reacted with isophorone diisocyanate (IPDI) and dibutylin dilaurate (DBTDL) to form Thiolated Acrylated Epoxidized Palm Oil Urethane (t-AEPOU). t-AEPOU was then reacted under UV photoirradiation for further reaction and to pre-determine its curing activities. The polymerization of AEPO and t-AEPOU were confirms by using Attenuated Total Reflection - Fourier-Transform Infra Red (ATR-FTIR). This study affords new approach in synthesis of Palm Oil bio-based Polyurethane Coating.

The Integration of Instrumental Elements and Vocal Music Teaching in Colleges and Universities Based on the Core Literacy View of Music

“…In this paper, the Fourier transform is used to convert it. Of course, it is not possible to directly do the Fourier transform of a whole sound signal [23][24][25]. Considering that the voice signal can be considered smooth in a short period of time, the voice signal is truncated into small segments to ensure that the detailed information in it will not be missed, and a window function with a length of 23.2ms and a step size of 10ms is used to process the voice signal, which makes the signal not be lost due to the large step size, and thus obtains each frame of the signal, and each frame will contain 1024 samples.…”