The use of a new low smoke, heat distortion temperature modifier for rigid PVC and chlorinated PVC is discussed. This material, CN-1427, is a tetrabromobisphenol A carbonate oligomer which is compatible with vinyl compositions. The carbonate oligomer can be compounded into PVC resin to improve heat distortion temperature of PVC and CPVC by 20â30Â°C.
Oppong is an Ashanti surname that originates in the Ashanti City-State. Notable people with the Ashanti surname include: Dominic Oppong (born 1986), Ghanaian-born Canadian soccer player.
The first recorded spelling of the family name is shown to be that of Johannes de Bentham. This was dated 1379, in the Poll Tax Returns of Yorkshire, during the reign of King Richard IInd, 1307 - 1327. Surnames became necessary when governments introduced personal taxation. In England this was sometimes known as Poll Tax.