It was found that the purity of macromonomer affected the copolymerization greatly, when the content of diol in PEO was greater than 1%, the crosslinking copolymer could be detected.

• 研究发现大分子单体的纯度对聚合反应影响很大，当PEO中双醇含量大于1%25时，可能会导致聚合反应中出现交联；