Chemical and Infrared analysis of purified samples shown that about 10% of total DBM was grafted onto LDPE backbone chain with covalent bond.

• 产品经二甲苯溶解，丙酮沉淀纯化数次后，由化学分析和红外鉴定表明，在挤出反应中确有40%25以上的DBM单体接枝到聚乙烯链上，接枝率可达到0．3DBM／100E。