首页> 外文会议>International symposium on polymer physics : Preprints. >HYDROGEN BONDING, MISCIBILITY, AND THERMAL BEHAVIOR OF BIODEGRADABLE POLYMER BLENDS OF POLY(3-HYDROXYBUTYRATE) AND POLY(4-VINYLPHENOL)
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HYDROGEN BONDING, MISCIBILITY, AND THERMAL BEHAVIOR OF BIODEGRADABLE POLYMER BLENDS OF POLY(3-HYDROXYBUTYRATE) AND POLY(4-VINYLPHENOL)

机译:聚(3-羟基丁酸酯)和聚(4-乙烯基苯酚)的生物可降解聚合物共混物的氢键合,混溶性和热行为

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@@The hydrogen bonding interactions, miscibility, and crystallinity of biodegradable polymer poly(3hydroxybutyrate) (PHB) blended with poly(4vinylphenol) (PVPh) were studied on the casting films as a function of the blend composition wpvph and temperature by using Fourier-transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). Over the whole composition range of PHB/PVPh blends, all DSC thermograms apparently exhibit a single T_g, and these values increase with wrvn, indicating that the PHB is miscible with PVPh in the melt state or the amorphous part of PHB is miscible with PVPh when PHB is crystallized in the blend. The intermolecular hydrogen bondings between the C=O groups of PHB and the OH groups of PVPh (designed as inter) were explored not only in C=O stretching vibration region but also in OH stretching vibration region. For PHB, the intramolecular hydrogen bonding interactions between the C=O groups and CH_3 groups of PHB (designed as intra) exists in lamellar structure of crystal part. The competing hydrogen bonding interactions between intra and inter is a crucial physical factor underlying the basic physics of the blends with respect to ordering via crystallization, miscibility, and even phase separation.
机译:通过使用傅立叶分析法研究了可生物降解的聚合物聚(3-羟基丁酸酯)(PHB)与聚(4-乙烯基苯酚)(PVPh)混合时的氢键相互作用,可混溶性和结晶度,其与混合组分wpvph和温度的关系。变换红外(FTIR)光谱,差示扫描量热法(DSC)和广角X射线衍射(WAXD)。在PHB / PVPh混合物的整个组成范围内,所有DSC热谱图都显示出一个单一的T_g,并且这些值随wrvn的增加而增加,表明PHB在熔融状态下可与PVPh混溶,或当PHB的无定形部分与PVPh可混溶。 PHB在混合物中结晶。不仅在C = O拉伸振动区域内,而且在OH拉伸振动区域内,都探索了PHB的C = O基团与PVPh的OH基之间的分子间氢键(设计为间)。对于PHB,PHB的C = O基团和CH_3基团(设计为内部)之间的分子内氢键相互作用存在于晶体部分的层状结构中。内部和内部之间竞争性的氢键相互作用是决定共混物基本结晶的基本物理因素,这些因素涉及结晶,可混溶甚至相分离的顺序。

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