以1,4 -环己烷二甲醇(CHDM)部分替代乙二醇(EG)与对苯二甲酸(PTA)共聚合成共聚酯(PETG)。

Partially substituting for ethylene glycol (EG), 1, 4-cyclohexanedimethanol (CHDM) was copolymerized with terephthalic acid (PTA) to produce copolyesters (PETG).

youdao

以二氧杂环己烷为溶剂，通过聚乙二醇2 70与对甲基苯磺酰氯反应合成了1 8冠6，产率64 .4 %。

Also, in dioxane solution, 18Crown6 was prepared in 64.4% yields by reaction of polyethylene glycol 270 and ptoluenesulfonyl chloride.

youdao

以二氧杂环己烷为溶剂，通过聚乙二醇2 70与对甲基苯磺酰氯反应合成了1 8冠6，产率64 .4 %。

Also, in dioxane solution, 18Crown6 was prepared in 64.4% yields by reaction of polyethylene glycol 270 and ptoluenesulfonyl chloride.

youdao