无规嵌段型含氟PAMMO基热塑性弹性体的合成与表征

为提高聚3-叠氮甲基-3-甲基氧丁环(PAMMO)基粘合剂的综合性能,利用阳离子开环聚合合成聚3,3-二(三氟乙醇甲醚基)氧丁环(PBFMO),与PAMMO共同作为原料,甲苯-2,4-二异氰酸酯(TDI)作为偶联剂,进一步合成无规嵌段型PAMMO基热塑性弹性体。分别采用FT-IR,NMR,GPC,DSC,TG/DTG,万能材料试验机对其化学结构、相对分子质量、热稳定性和力学性能进行表征。结果表明无规嵌段型PAMMO基热塑性弹性体的数均相对分子质量为38200,热分解温度大于220℃,断裂强度为15MPa,断裂伸长率为700%,具有良好的热稳定性和优异的力学性能。

Synthesis and Characterization of Random Block Fluorine-Containing PAMMO Based Thermoplastic Elastomers

The fluorine-containing 3-azidomethyl-3-Methyloxetane (PAMMO) based thermoplastic elastomers were developed using PAMMO and the poly3,3-bis(2,2,2-trifluoro-ethoxymethyl) oxetane] glycol (PBFMO)preparing from a cationic polymerization as the raw materials,toluene-2,4-diisocyanate (TDI) as the coupling agent to enhance its comprehensive properties.The molecular structure,relative molecular mass and mechanical properties of thermoplastic elastomers were confirmed by FT-IR,NMR,GPC,DSC,TG/DTG and universal testing machine respectively.The results show that the number average relative molecular mass of the thermoplastic elastomers was 38200,the decomposition temperature(Td) was found to be 220 ℃,the tensile strength at break was 15 MPa,and the corresponding elongation was 700％.Therefore,the thermoplastic elastomers exhibited good thermal stability and mechanical properties.