几种降解性脂肪族聚酸酐的合成及性能表征

通过高真空熔体缩聚法合成了下列几种基于脂肪癸二酸的共聚物：癸二酸－间苯二酸共聚物（ＰＳＡ－ＰＩＰＨ）、癸二酸－聚乙二醇共聚物（ＰＳＡ－ＰＥＧ）、癸二酸－酒石酸共聚物（ＰＳＡ－ＰＴＴＡ）、癸二酸与四氢呋喃－环氧乙烷共聚醚（Ｍｒ＝１５００）的共聚物（ＰＳＡ－ＰＥＧ／ＴＨＦ）．采用１Ｈ或１３Ｃ核磁共振分析、红外光谱分析、差示扫描量热法（ＤＳＣ）对获得的聚合物进行了分析和表证．测定了聚合物的熔点及特性粘数．ＤＳＣ测定结果表明ＰＳＡ－ＰＥＧ和ＰＳＡ－ＰＥＧ／ＴＨＦ具有较低的结晶度．实验表明ＰＳＡ－ＰＩＰＨ、ＰＳＡ－ＰＴＴＡ比ＰＳＡ具有更好的成膜性质．

Synthesis and Characterization of Several Degradable Aliphatic Polyanhydrides

The following copolymers based on aliphatic sebacic acid were synthesized through a vacuum-melt polycondensation process:poly(sebacic acid)-b-poly(isophthalic acid)(PSA-PIPH).poly (sebacic acid) -b- (tartaric acid) (PSA-PTTA). poly (sebacic acid) -b-poly (ethylene glycol)(PSA-PEG). copolymers of PSA and copolyether (M1= 1500) of epoxy ethane and (tetrahydrofuran)(PSA-PEG/THF). All these copolymers were characterized by means of 1H or 13C NMR. IR spectrometry. differential scanning calorimetry (DSC). Intrinsic viscosity and melting points were measured to estimate the molecular weights of polymers. DSC measurements indicated that PSA-PEG. PSA-PEG/THF have much lower crystallinity. On the other hand,PSA-PIPH and PSA-PTTA exhibit better film or fibre-forming properties than PSA.