聚醋酸乙烯酯(PVAc)对PHB/PCL共混物理化性能研究  

Effect of poly(vinyl acetate)(PVAc)on physicochemical properties of PHB/PCL blends

作　　者：陈程 张豪 杨梦瑶 陈海英 孙昊 卫灵君 CHEN Cheng;ZHANG Hao;YANG Mengyao;CHEN Haiying;SUN Hao;WEI Lingjun(Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院,江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《中国塑料》2024年第1期14-20,共7页China Plastics

基　　金：国家重点研发计划(2022YFD2100305-01);川菜发展研究中心规划项目(cc22Z01)。

摘　　要：聚醋酸乙烯酯(PVAc)作为非共价键型增容剂加入到聚羟基丁酸酯(PHB)/聚己内酯(PCL)(25∶75,质量分数,下同)二元共混体系中,通过溶液浇铸法制备薄膜,探究不同含量的PVAc(1%、3%、5%)对PHB/PCL共混物体系的力学性能和理化性能的影响。结果表明,PVAc含量为1%时,薄膜的断裂伸长率和拉伸强度分别为未添加PVAc的PHB/PCL薄膜的2.50倍、1.19倍。傅里叶变换红外光谱(ATR‐FTIR)显示,在PVAc的桥联作用下,PHB和PCL的羰基(C=O)基团和甲基(CH_3)基团之间存在分子间氢键的相互作用,羰基峰(C=O)发生移位,并且峰值降低。扫描电子显微镜(SEM)显示,PVAc的加入降低了共混体系中分散相的尺寸,分布更为均匀,共混体系的相容性有所改善。Poly(vinyl acetate)(PVAc)as a non‐covalent compatibilizer was incorporated into a polyhydroxybutyrate(PHB)/polycaprolactone(PCL)binary blending system at a mass ratio of 25/75,and its film was prepared through solu‐tion casting.The effect of addition amounts of PVAc on the mechanical properties and physicochemical properties of the blend system was investigated.Tensile experimental results indicated that the elongation at break and tensile strength of the PHB/PCL film containing 1 wt%PVAc were 2.50 and 1.19 times higher than those of the counterpart film without PVAc,respectively.FTIR spectra showed that there was an intermolecular hydrogen bonding interaction between the carbonyl and methyl groups of PHB and PCL due to a bridging action of PVAc.This results in a shift of carbonyl absorp‐tion band along with a decrease in the peak intensity.SEM showed that the addition of PVAc reduced the size of dis‐persed phase in the blend system,promoting a more uniform distribution.As a result,and the compatibility of the blend system was improved.

关 键 词：聚羟基丁酸酯 聚己内酯 聚醋酸乙烯酯 增容剂 共混 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]