Fluorescent PMMAs containing a phthalic anhydride (PA) group at the chain ends were prepared using the newly developed initiator 7 by atom transfer radical polymerization and subsequent pyrolysis. These polymers allowed for the detection of inter-macromolecular reaction in reactive polymer blends at a low concentration by the use of fluorescence-gel permeation chromatography. The PA-amine coupling reaction proved to be efficient in reactive blending studies for the compatibilization of PS-PMMA blends at low concentration (≤8%) giving a morphology where the average PMMA drop size is 0.6 μm. With 7-nitrobenz-2-oxa-1,3-diazole (NBD) groups as the fluorescent label, the blend morphologies could be visualized in three dimensions by laser confocal microscopy.
Bibliographical noteFunding Information:
This research was supported by the Industrial Partnership for Research in Interfacial Materials Engineering (IPRIME) at the University of Minnesota and by an American Chemical Society–Petroleum Research Fund grant (PRF#33556-AC7). We are grateful to Dr Hyun Kyoung Jeon for helpful discussion and the help in obtaining confocal microscopic images and Mr Qiwei Lu for particle analysis of the blends.
- Atom transfer radical polymerization
- Fluorescent reactive polymers
- Phthalic anhydride functionalized polymers