聚β-羟基丁酸酯辐照接枝顺丁烯二酸酐及产物表征  

GRAFTING OF MALEIC ANHYDRIDE ONTO POLY(β-HYDROXYBUTYRATE) BY ^(60)Coγ RADIATION

作　　者：叶鹤荣[1] 杨冬芝[1] 胡平[1] 张凤波[1] 齐庆磊[1] 赵威[1] 

机构地区：[1]清华大学化学工程系高分子研究所,北京100084

出　　处：《高分子学报》2005年第5期678-682,共5页Acta Polymerica Sinica

摘　　要：探索了一种提高聚β羟基丁酸酯(PHB)热稳定性的方法,即用60Coγ射线辐照对PHB进行顺丁烯二酸酐(MAH)的接枝,采用1HNMR、13CNMR、TGA、DSC、XRD等方法对辐照接枝产物进行了表征.1HNMR、13CNMR谱图结果表明MAH单体接枝到了PHB上.TGA测试表明,辐照接枝产物的热稳定性显著提高,如接枝率为0.52%的样品热分解温度提高了36K.DSC研究表明辐照接枝产物的熔融温度和结晶温度均降低.此外,由于引入极性单体顺丁烯二酸酐,接枝产物的结晶度降低,同时亲水性提高.An effective way to improve the thermostability of poly （β-hydroxybutyrate）（PHB） was developed. Maleic anhydride（MAH） was grafted onto PHB by 60^Coγ characterize radiation. 1^H-NMR, 13^C-NMR, TGA, DSC and XRD were used to characterize the radiated samples. The results of both 1^H-NMR and 13^ C-NMR are consistent with the successful grafting of MAH monomers onto PHB molecules. The TGA measurements demonstrated that the thermal stability of grafted PHB was measurably improved with the introduction of MAH groups. The 5 % weight loss temperature of the grafted PHB with a graft degree of 0. 52 % was enhanced by 36 K. These significant results suggest that wide commercial application of PHB may be possible. The DSC results showed both the melting temperature and crystallization temperature of the grafting products were decreased. Moreover, the crystallinity of the grafted PHB was decreased with the introduction of MAH groups, and the hydrophilic property was improved.

关 键 词：聚Β-羟基丁酸酯 羟基丁酸酯 顺丁烯二酸酐 结构表征 熔融温度 结晶温度 接枝产物 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]