BAMO-AMMO三嵌段共聚物相分离及晶体结构的解析

Phase Segregation and Crystal Structure Analysis of BAMO-AMMO Tri-block Copolymer

采用DSC方法研究了3,3′-双叠氮甲基环氧丁烷-3-叠氮甲基-3′-甲基环氧丁烷(BAMO-AMMO)三嵌段共聚物的相分离程度,根据Scherrer公式和Bragg方程计算了pBAMO均聚物和BAMO-AMMO三嵌段共聚物的微晶尺寸和晶面间距,利用XRD比较了两者的结晶度。结果表明,BAMO-AMMO三嵌段共聚物形成了软硬段的相分离,相分离程度为79.45%,具有热塑性弹性体的性质;pBAMO均聚物的结晶度为80.30%,BAMO-AMMO三嵌段共聚物中BAMO链段的结晶度为74.81%。由于部分软硬段之间的互溶,导致了三嵌段共聚物玻璃化转变温度的升高以及结晶度的降低。

Phase segregation degree of 3,3＇-bisazidomethyloxetane-3-azidomethyl-3＇-methyloxetane（BAMO-AMMO） tri-block copolymer was investigated by DSC.Grain size and interplanar spacing of pBAMO homopolymer and BAMO-AMMO tri-block copolymer were calculated using Scherrer and Bragg equation.Crystallinity of pBAMO homopolymer and BAMO-AMMO tri-block copolymer was compared through XRD patterns.The results show that apparent phase segregation of soft and hard seqments exists in BAMO-AMMO tri-block copolymer.The copolymer exhibites thermoplastic elastomer characteristics.The degree of phase segregation is 79.45%.Crystallinity of BAMO segment in copolymer is 74.81%,compared with 80.30% of pBAMO homopolymer.Increase in glass transition temperature and decrease in crystallinity of tri-block copolymer are caused by partly miscible between soft and hard segments.