4 years ago

Investigation of polybenzoxazine gelation using laser light scattering

Investigation of polybenzoxazine gelation using laser light scattering
Hui Li, Sadhan C. Jana, Senlong Gu, Tianbo Liu, Shantel Thomas
The mechanism of phase growth and gelation due to polymerization of benzoxazine into polybenzoxazine (PBZ) in dimethylsulfoxide and N-methyl-2-pyrrolidone was monitored using laser light scattering. The radius of gyration (Rg) and hydrodynamic radius (Rh) increased gradually with time, confirming nucleation and growth as the mechanism of polymerization-induced phase separation of PBZ in both the solvents. The experimental data inferred from laser light scattering and scanning electron microscopy established that the PBZ gel networks were formed by spherical building blocks in dimethylsulfoxide and by cylindrical strands in N-methyl-2-pyrrolidone. In the latter case, the cylindrical strands originated from joining of several spheres. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45709.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/app.45709

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