结肠靶向性高分子——甲基丙烯酸甲酯—甲基丙烯酸共聚物理化性质的研究  

Colontargeting polymers a study of physical and chemical properties of PMMAcoMAA

作　　者：郭圣荣[1] 傅崇东[1] 刘罡一[1] 廖荣平 徐惠南[1] 

机构地区：[1]上海医科大学药剂学教研室

出　　处：《中国药学杂志》1999年第7期463-465,共3页Chinese Pharmaceutical Journal

摘　　要：目的：制备具有不同酸值的甲基丙烯酸甲酯甲基丙烯酸共聚物（ＰＭＭＡｃｏＭＡＡ），研究其理化性质以便评估其结肠靶向性。方法：以ＰＭＭＡｃｏＭＡＡ薄膜为对象，研究薄膜的水渗透性、溶胀性、临界溶解ｐＨ和在不同ｐＨ缓冲液中的稳定性。结果：ＰＭＭＡｃｏＭＡＡ的理化性质差异是它们的酸值不同导致的，ＰＭＭＡｃｏＭＡＡ酸值越小，其临界溶解ｐＨ越大。结论：ＰＭＭＡｃｏＭＡＡ的理化性质取决于它们的酸值大小。BJECTIVE: Several copovymers of methyl methacrylate (MMA) and methacrylic acid(MAA) as potential coatings for colon delivery.HZMETHODS: Water vapor transimission,swelling characteristics,in vitro dissolution and stability in function of pH were investigated using the technique of isolated films. RESULTS: The data presented demonstrate relative differences in physicochemical characteristics duo to differences in acid value.The lower acid value is ,the higher critical dissolution pH is. CONCLUSION: The physicochemical properties of PMMAcoMAA are highly influenced by their acid values.

关 键 词：PMMA-co-MAA 结肠靶向性 临界溶解pH 

分 类 号：R944[医药卫生—药剂学] R913[医药卫生—药学]