화학공학소재연구정보센터
Polymer Engineering and Science, Vol.53, No.2, 295-300, 2013
Fluorescence quenching of fluoranthene by maleic anhydride in solution and during nonreactive and reactive twin-screw extrusion
Fluorescence quenching of fluoranthene by maleic anhydride (MAH) in polypropylene (PP) during twin-screw extrusion (TSE) was investigated using an online fluorescence measurement system. The fluorescence quenching effect was clearly seen from the decrease of the peak intensity and integrated area of the residence time distribution (RTD) curves when MAH was introduced into PP. Fluorescence quenching effect in TSE was compared with that in chloroform solution and in both cases, it followed the linear Stern-Volmer equation although it showed lower quenching effect in TSE than in solution. Using this quenching phenomenon, it was possible to measure online the grafting degree of PP with MAH in the TSE. The obtained results showed that MAH grafting degree and total conversion measured by both fluorescence technique and by Fourier transform infrared spectroscopy were in good agreement for MAH weight concentrations up to 0.8 wt%. POLYM. ENG. SCI., 2013. (c) 2012 Society of Plastics Engineers