P(HB-co-HV)/PVPh的相容性与聚集态结构

Miscibility and Aggregation Structure of Poly(β hydroxybutyratecoβhydroxyvalerate)/Poly(pvinylphenol) (P(HBcoHV)/PVPh) Blends

采用差热扫描分析、红外光谱、固体核磁、小角Ｘ光散射等方法研究了聚（β－羟基丁酸酯－ｃｏ－β－羟基戊酸酯（Ｐ（ＨＢ－ｃｏ－ＨＶ））／聚（对－羟基苯乙烯）（简称ＰＶＰｈ）共混物的相容性和形态．结果表明两组分间形成较强的分子间氢键，形成完全相容的共混体系．固体核磁结果表明Ｐ（ＨＢ－ｃｏ－ＨＶ）／ＰＶＰｈ（５０／５０）在３．４ｎｍ尺寸上是完全均相的．小角Ｘ光散射结果表明，在等温结晶的共混物中无定形的ＰＶＰｈ分子分散在Ｐ（ＨＢ－ｃｏ－ＨＶ）片晶之间与非晶的Ｐ（ＨＢ－ｃｏ－ＨＶ）分子形成非晶区，从而使非晶区加宽。

The miscibility and aggregation structure of P(HBcoHV)/PVPh blends have been investigated by DSC, FTIR, 13C NMR, WAXD, SAXS. The results show that the intermolecular hydrogen bonding formed between the components makes the blends completely miscible in the whole composition range in the melt state. The solid state 13C NMR results show that the blend of P(HBcoHV)/PVPh(50/50) mixed on a scale smaller than 34 nm. The SAXS results show that the long periods of the blends increase with the increase of PVPh content, indicating that the amorphous PVPh was dispersed between the lamellae forming the amorphous part with amorphous P(HBcoHV).