CHARLOTTE, N.C. (April 18)—B.F. Goodrich Co. will divest its Performance Materials business by year-end to concentrate on its Aerospace and Engineered Industrial Products operations. The divestiture is being made to better position the three businesses in the future, a spokesman said. Performance Materials is a global supplier of specialty polymer systems and chemical additives. It had record sales of more than $1.2 billion in 1999, with operating income of $150 million.