摘要
基于生物基热塑性聚羟基脂肪酸酯(PHAs)与绿色植物多酚,利用偶联反应制备了一系列生物可降解的聚(3-羟基丁酸酯-co-3-羟基戊酸酯)(PHBV)/茶多酚(TP)共聚物(PHTP)。利用红外光谱、差示扫描量热、热台偏光显微镜、热重分析及电子万能材料试验机分析研究了PHTP共聚物的结构及TP对共聚物耐热性能和力学性能的影响。结果表明,偶联改性提高了PHTP共聚物的结晶起始温度和结晶温度,降低了PHTP共聚物的结晶速率;PHTP共聚物的耐热性提高,初始降解温度和最大降解温度均升高约10℃;PHTP共聚物薄膜样品的拉伸断裂强度及断裂伸长率分别增加34%和200%。
The poly（3-hydroxybutyrate-co-3-hydroxyvalerate）（PHBV）/tea polyphenols （TP） copolymer （PHTP） was successfully prepared by coupling reaction using diphenyl methane diisocyanate （MDI） based on bacterial thermoplastic biodegradable polyester PHBV and plant polyphenol. The chemical structure, crystallization behaviors, crystalline morphologies, thermal stability and mechanical properties of PHTP copolymers were investigated by Fourier transform infrared （FT-IR）, differential scanning calorimetry （DSC）, Polarizing optical microscopy （POM）, thermogravimetric analysis （TG） and electronic universal material testing machine. The results show that with the addition of TP component, the crystallization rate of PHTP copolymer reduces, while the crystallization onset and peak temperature are improved. Compared to those of neat PHBV, the initial degradation temperature and maximum degradation temperature of PHTP copolymer are both improved by about 10 ℃, moreover, the tensile strength and elongation at break of PHTP copolymer are enhanced by 34% and 200%, respectively.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第2期37-41,共5页
Polymer Materials Science & Engineering
基金
长江学者和创新团队发展计划资助(T2011079
IRT1221)
上海市自然科学基金资助项目(13ZR1401700)
中央高校基本科研业务费专项基金(CUSF-DH-D-2013007)
