CAJ | 학술논문

以均苯四甲酸酐、D,L-苯丙氨酸和1,4-丁炔二醇为原料合成了一种含有酰亚胺环和炔基的二醇,并以其为扩链剂,采用预聚体法,与4,4-二苯基甲烷二异氰酸酯(MDI)和聚四氢呋喃醚二醇(PTMG)反应,合成了不同硬段含量的主链含有酰亚胺环和炔基的热塑性聚酰亚胺型聚氨酯弹性体。用红外光谱( FTIR)、电子拉力机、热失重分析( TG)、广角X射线衍射( XRD)、 UL-94垂直燃烧和极限氧指数对聚酰亚胺型聚氨酯弹性体进行了表征。结果表明,这种聚氨酯呈现出无定形结构；其拉伸强度随着硬段含量的增加而增大；与传统的热塑性聚氨酯相比,酰亚胺环和炔基改性的聚酰亚胺型聚氨酯弹性体的热分解过程非常缓慢,呈现出较好的热稳定性；不同硬段含量的聚酰亚胺型聚氨酯弹性体的UL-94垂直燃烧均达到V-2级别；其极限氧指数随着硬段含量的增加而增大。
이균분사갑산항、D,L-분병안산화1,4-정결이순위원료합성료일충함유선아알배화결기적이순,병이기위확련제,채용예취체법,여4,4-이분기갑완이이청산지(MDI)화취사경부남미이순(PTMG)반응,합성료불동경단함량적주련함유선아알배화결기적열소성취선아알형취안지탄성체。용홍외광보( FTIR)、전자랍력궤、열실중분석( TG)、엄각X사선연사( XRD)、 UL-94수직연소화겁한양지수대취선아알형취안지탄성체진행료표정。결과표명,저충취안지정현출무정형결구；기랍신강도수착경단함량적증가이증대；여전통적열소성취안지상비,선아알배화결기개성적취선아알형취안지탄성체적열분해과정비상완만,정현출교호적열은정성；불동경단함량적취선아알형취안지탄성체적UL-94수직연소균체도V-2급별；기겁한양지수수착경단함량적증가이증대。
A kind of glycol containing imide and alkynyl function was synthesized from pyromellitic dian-hydride(PMAD), butynediol(2-butyne-1,4-diol) and D,L-phenylalanine(DLP). Linear imide and alkynyl modified thermoplastic poly(imide-urethane)s were prepared by the obtained glycol, 4,4’-diphenylmethane diisocyanate(MDI) and poly(tetrahydrofuran) (PTMG) via prepolymerization. The poly(imide-urethane)s structures were characterized with Fourier transform infrared spectroscopy ( FTIR ) , universal testing machine tension, thermalgravimetric analysis( TGA) , wide-angle X-ray diffraction( XRD) . The results showed that the novel thermoplastic poly( imide-urethane) s elastomer with amorphous structure were successfully synthesized. The tensile strength increases with the hard segment contents. Comparing with the conventional thermoplastic polyurethanes extended by 1,4-butanediol, the poly( imide-urethane) s show slower thermal degradation rate during the degradation process. The polymers with different hard segments contents all reach a UL-94 V-2 rating, and the limiting oxygen index( LOI) value increases with different hard segments contents.