聚缩水甘油醚硝酸酯的合成及固化

以纯度≥99.5%的缩水甘油硝酸酯(GN)为原料,采用阳离子聚合,合成了两种分子量3000左右的聚缩水甘油醚硝酸酯(PGN)粘合剂。采用红外(IR)、核磁(NMR)和凝胶渗透色谱(GPC)表征了它们的结构。测试了PGN的主要性能。研究了PGN与常用异氰酸酯多苯基多亚甲基多异氰酸酯(PAPI)、改性六亚甲基多异氰酸酯(N-100)、甲苯二异氰酸酯(TDI)、二环己基甲烷二异氰酸酯(HMDI)]的固化反应。结果表明,在催化剂二月桂酸二丁基锡(DBTDL)或三苯基铋(TPB)作用下,PGN可与PAPI、N-100、TDI、HMDI等快速反应固化。固化试样经60℃贮存60天,邵A硬度无明显下降。

Synthesis and Curing of Poly(glycidyl nitrate)(PGN)

Two kinds of poly(glycidyl nitrate)(PGN)binders with molecular weight of about 3000 were synthesized via cationic polymerization using glycidyl nitrate(GN)with purity of more than 99.5% as raw material.Their structures were characterized by infrared spectroscopy(IR),nuclear magnetic resonance(NMR)and gel permeation chromatograph(GPC).The main properties of PGN were tested.The curing reaction of PGN with common isocyanates,polyaryl polymethylene isocyanate(PAPI),modified hexamethylene polyisocyanate(N-100),toluene diisocyanate(TDI),dicyclohexyl methane diisocyanate(HMDI)was studied.Results show that the curing reaction of PGN can performed rapidly with PAPI,N-100,TDI and HMDI etc.under the action of catalysts dibutyltin dilaurate(DBTDL)or triphenyl bismuth(TPB),and the cured samples have no obvious decrease in Shore A hardness after storeing at 60℃ for 60 days.