丙烯酸酯类共聚物共混／接枝淀粉的研究———改性用丙烯酸酯的预共聚

STUDY ON STARCH MODIFIED BY BLENDING/GRAFTING WITH ACRYLIC PRE COPOLYMER PRE COPOLYMERIZATION OF ACRYLICS FOR STARCH MODIFICATION

合成了丙烯酸酯四元共聚物（ＭＭＡ／ＢＡ／ＡＡ／ＨＥＭＡ）。利用ＩＲ、ＤＳＣ分析了共聚物的组成，用ＧＰＣ测定了共聚物的分子量及分子量分布。用该四元共聚物为预聚物改性淀粉，使其作为填充剂填充ＬＤＰＥ后，与单一丙烯酸酯改性相比。

A copolymer has been prepared from methyl methacrylate,butylacrylate,acrylic acid and β hydroxyethyl methacrylate.IR and DSC were used to analyze the composition of the copolymer.The molecular weight and the molecular weight distribution of the copolymer were determined by GPC.The starch modified with the copolymer was filled in LDPE,the blend film had improved tensile stress and elongation at break compared with LDPE film filled with starch madified with homopolyacrylics