Poly(p-oxybenzoate) (PpOBA) has been polymerized in the bulk at temperatures below the melting point of the monomer. Polymerization involves, isothermally, sublimation recrystallization-melting (chemical reaction)-polymerization-liquid crystal domain formation-crystallization processes. Lamellae, about 100/k thick for PpOBA, are observed along with particulate material. D.s.c. and FTi.r. scans indicate that the sublimate is identical to the monomer, but that the 'melt' has undergone some esterification. The polymer produced is of relatively low molecular weight, but the degree of polymerization can be rapidly increased by heating to elevated temperatures
Посилання на статтю:
Lamellar crystallization during bulk polymerization of poly(p-oxybenzoate) / F. Rybnikar, B.-L. Yuan and P. H. Geilt // Polymer. – 1994. – Vol 35. – P. 1863-1868.