摘要
对生物可降解聚（3-羟基丁酸和4-羟基丁酸酯）共聚物[Poly（3HB-co-4HB）]进行研究。3-羟基丁酸和4-羟基丁酸酯共聚物大大改变了聚3-羟基丁酸酯（PHB）均聚物的缺点，通过一系列物理实验方法证明，随着4-羟基丁酯酯（4HB）含量增加，熔体流动速率由20．7g／10min降低至8．9g／10min，而黏度增加1．8倍，熔融温区增宽20℃，结晶度由11．57%减小到50%，球晶消失。拉伸强度由13．5MPa降低至7．9MPa，断裂伸长率由796％增加至1020％不断裂，柔韧性增加。玻璃化转变温度由-7．29℃升高至-3．17℃。对原料下游制品的开发有广泛的应用价值。
Poly（3-hydroxybutyrate-co-4-hydroxybutyrate） was studied in this paper, poly（3-hydroxybutyrate） possesses a narrow melting range, a high crystallinity, large spherulite sizes and brittle fracture, which limited its application. When copolymerized with 4-hydroxybutyrate, several properties were im- proved. With increasing the amount of 4HB, rr^t flow rate decreased from 20.7 g/10 min to 8.9 g/10 min, viscosity＇number increased 1.8 times, melting range was widened to T = 150- 170℃, and crystallinity decreased from 11.57 % to 5 % and spherulites were no longer observed. In addition, the tensile strength decreased from 13.5 to 7.9 MPa, elongation at break increased from 796 % to 1 020 %, glass temperature was increased from - 7.29 ℃ to - 3.17 ℃, which is beneficial to processing.
出处
《中国塑料》
CAS
CSCD
北大核心
2007年第1期48-51,共4页
China Plastics
