There are about 5.5mol% DEG segments will add to macromolecular chain of regenerative PET, while the chain has 5.7mol% ET segments in waste PET with butanediolysis and then condensation.

• 乙二醇醇解再生的聚酯中含有5.；5mol%25DEG链段，而经1；4丁二醇解聚再生的共聚酯中含有5