| http://www.w3.org/ns/prov#value | - lymerization degree in a primaryreaction tank but decreasing the polymerization degree in each of the remaining reaction tanks to such a level as not affecting the transparency or by controlling the monomer ratio in each reaction tank so that the composition of the resulting copolymerremains constant.The reaction tank may preferably be equipped, as a system for removing heat of polymerization, wit
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