| 摘要 |
Disclosed is an improved process for the preparation of branched polyethylene terephthalate and co-polyethylene terephthalate, having high melt viscosities. The process comprises carrying out the polymerization of the branched polyethylene terephthalate in intimate admixture with a small amount of isophthalic acid. Polyethylene terephthalate with high melt viscosities are obtained and are free from inhomogeneities.
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