Premium
Online‐Analysis on Acoustically Levitated Droplets
Author(s) -
Biedasek Silke,
Abboud Mohammed,
Moritz HansUlrich,
Stammer Achim
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200751344
Subject(s) - polymerization , monomer , raman spectroscopy , evaporation , materials science , polymer chemistry , aqueous solution , chemical engineering , analytical chemistry (journal) , polymer , chemistry , composite material , organic chemistry , thermodynamics , optics , physics , engineering
Abstract Summary: Aqueous solutions of acrylic acid were levitated in a 40 kHz acoustic levitator. The monomer amount in the levitated droplets was monitored by Raman spectroscopy relating to an internal standard. Thus evaporation of the monomer as well as polymerization reactions initiated by a redox system were investigated by Raman spectroscopy and resultant data were compared to HPLC data. Decreases in monomer amount due to evaporation can be clearly distinguished from polymerization reactions. Additionally, temperature measurement within the droplet throughout a polymerization reaction shows the typical temperature course originating from the heat of polymerization.