Isomeric Poly(benzophenone)s: Synthesis of Highly Crystalline Poly(4,4'- benzophenone) and Amorphous Poly(2,5-benzophenone), a Soluble Poly(p-phenylene) Derivative
NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF CHEMISTRY
Pagination or Media Count:
Nickel-catalyzed polymerization which employs the coupling of isomeric dichlorobenzophenones is described. The polymerization utilizes inexpensive readily available monomers, 4,4-dichlorobenzophenone 4,4-DCBP and 2,5-dichlorobenzophenone 2,5-DCBP. The poly4,4-benzophenone can be derivatized to be soluble during the synthesis by the use of a ketimine precursor that is subsequently hydrolyzed to give the target material. The polymerization of 2,5-dichlorobenzophenone yields a soluble derivative of polyp-phenylene. The resulting polymers were characterized to confirm the composition, molar mass, and thermal properties. The NiO catalyzed route proves to be facile and economically feasible and opens the way to a large variety of heterocyclic and phenyl-based homo- and copolymers. 4,4- dichlorobenzophenone, Hydrolyzed, Molar mass, Thermal.
- Polymer Chemistry