多官能度炔烃与叠氮化物的固化研究

采用差热扫描量热仪 (DSC)研究了不同分子量的端叠氮基聚乙二醇 (ATPEG)与N ,N ,N′,N′ 四炔丙基乙二胺及 1 ,1 ,1 三 (炔丙氧甲基 )丙烷的固化反应动力学 ,并利用FT IR跟踪了固化反应过程中特征基团的变化 .结果表明 ,ATPEG与N ,N ,N′,N′ 四炔丙基乙二胺固化反应的峰温及反应活化能均高于与 1 ,1 ,1 三 (炔丙氧甲基 )丙烷的固化反应 .增加ATPEG的分子量 ,升高了与多官能度炔烃的固化峰温 ,却降低了固化反应的活化能 .而采用扩链剂仅降低固化反应活化能 .

AN INVESTIGATION ON THE CURING KINETICS OF MULTIFUNCTIONAL ALKYNES WITH AZIDES

Three multifunctional alkyne derivatives were synthesized,of which N,N,N ′, N ′\|tetrapropargyl ethylene diamine (1) and 1,1,1\|tri(propargyl oxymethyl)propane (2) were used as curing agents while propargyl\|terminated polyalkylene glycols (3) as a flexible chain\|extender.The curing kinetics of azido\|terminated polyalkylene glycols (ATPEG) of different molecular weights with 1 and 2 was investigated in details by using DSC,and the variation of the characteristic groups in the curing reaction was studied by FT\|IR.It was shown that the peak temperature and the activation energy of the curing reaction between ATPEG 1 and are higher than those between ATPEG and 2.Increasing the ATPEG molecular weight results in a peak temperature increase of the curing reaction and a decrease of the curing activation energy.When the ATPEG molecular weight is more than 1000,further increasing the molecular weight has little influence on the curing activation energy.However,adding 3 only plays a role of decreasing the curing activation energy of ATPEG\|400 with 1.It was observed that both the increase of the molecular weight of ATPEG and the usage of the chain\|extender affect the curing activation energy in same ways.