(b). Molecular weight and softening point of epoxy resin is strongly dependent on the molar ratio between epichlorhydrin and bisphenol A. Describe the effect of varying molar ratio of epichlorhydrin to bisphenol A on molecular weight and softening point of epoxy. Berat molekul dan titik kelembutan resin epoks/ bergantung kuat kepada ratio molar antara epikorohidin dan bisfeno A Terangkan kesan mengubah molar ratio antara epikorohidin dan bisfenol A terhadap berat molekul dan titik kelembutan epoksi (7 marks/markah) (c). In curing of unsaturated polyester. Initiating systems which are effective at room temperature normally consist of mixtures of a peroxy compound and an activator (accelerator). Outline typical examples of peroxy and activator used and write the advantages and limitations of each peroxy and activator given Semasa pematangan poliester tak tepu, sistem pemula pada suhu bilik mengandungi campuran antara peroksi dan pengaktil. Berikan contoh peroksi dan pengaktif dan tuliskan kelebihan dan kelemahan setiap peroksi dan pengaktif yang diberikan (7 marksimarkah)