Polyester film and methods for making same
A polyester and film technology, applied in the field of polyester film and its manufacture, can solve the problems of no production, low maximum molecular weight, etc.
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[0075] The molecular weight of a polymer can be estimated from the inherent viscosity (I.V.). Inherent viscosity is determined in a 1% (w / v) solution of the polymer in o-chlorophenol at 25°C. The dosage unit of the catalyst is ppm, which is the ratio of the metal weight to the weight of dimethyl terephthalate or terephthalic acid (depending on which monomer is used).
[0076] A) Polymerization
[0077] The following polymer reactants were charged to the reactor: dimethyl terephthalate (78.02 kg), isosorbide (15.42 kg) and ethylene glycol (49.90 kg), which corresponded to a molar ratio of 1:0.26:2.00. The reactor is a Hastelloy B polymerization reactor with a maximum capacity of 50 gallons, and a Hastelloy B water-cooled reflux tower with a radius of 6" is installed on it. The reflux tower is equipped with a stainless steel ring. The reactor is also equipped with There is a stainless steel ribbon stirrer, a water-cooled condensing device and a bypass. Add catalysts, including...
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