The Most popular epoxy resins are possibly diglycidyl ethers of bisphenol A, and that is created by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular weight is controlled by adjusting the ratio of ECH to BPA; higher ratios make reduced molecular weights. While in the realm of composites, epoxy https://www.propanraya.com/kategori/cat-lantai