Classes of Polymers Addition,or chain-growth,polymers. repeating unit H CI H H H vinyl chloride poly(vinyl chloride) Copyright2010 Pearson Prentice Hall,Inc. Condensation,or step-growth,polymers. C0o-ct wo cn.on limethyl terephthalate repeating unit 0-CH-CH一OH+2nCH,OH Dacron"polyester Copyright2010 Pearson Prentice Hall.Inc. Chapter 26 3Chapter 26 3 Classes of Polymers ▪ Addition, or chain-growth, polymers. ▪ Condensation, or step-growth, polymers