Studies on selected polymeric materials using the photoacoustic spectroscopic technique

作     者：Hukum Singh 

作者机构：School of Engineering and Technology ITM University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2011年第20卷第6期

页      面：453-457页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

主　　题：photoacoustic PCPH PCGH PMMA 

摘      要：Polymethylmethacrylat-graft-polybisphenol A-carbonate （PMMA-G-PC） with 50% grafting is synthesized. The graft co-polymerization of methyhnethacrylate （0.036 mol. lit-1） onto polybisphenol-A-carbonate （0.5 g） in the presence of a redox couple formed from potassium persulphate （40 mol-lit-1） and thio-urea （30 mmol. lit-1） in aqueous nitric acid （0.18 M, 100 ml） in air at （45±2）℃ for 3.0 h. Condensation of （PMMA-G-PC） with N- [p-（carboxyl phenyl amino acetic acid）] hydrazide （PCPH） affords polybisphenol-A-carbonate-graft-polymethylmethacrylate hydrazide （PCGH）. The photoacoustic （PA） spectra of （PCGH） are recorded in a wavelength range from 200 nm to 800 nm at a modulation frequency of 22 Hz, and compared with those of pure polybisphenol-A-carbonate （PC）, （PMMA-G-PC） and （PCPH）. In the present work, a non-destructive and non-contact analytical method, namely the photoacoustic technique, is successfully implemented for optical and thermal characterization of selected polymeric materials. The indigenous PA spectrometer used in the present study consists of a 300-W xenon arc lamp, a lock-in amplifier, a chopper, a （1/8）-m monochromator controlled by computer and a home-made PA cell.