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A novel polyarylene sulfide, polyarylene sulfide sulfone imide, was polymerized with a new monomer (Dichlorodiimide) and sodium sulfide by taking high temperature (200℃) N-methyl-2-pyrrolidinone (NMP) as solvent. The polymer was characterized by using conventional methods. Physical properties of the polymer, including thermal stability and solubility, were also studied. DSC and TG analyses reveal that the glass transition temperature T is equal to 252.4 ℃ and that the thermal decomposition temperature Td is equal to 484.9℃. 相似文献
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用化学酰亚胺技术首先合成含完全酰亚胺环的单体.然后与Na2S常压聚合,从而在聚芳硫醚分子主链中引入了刚性的酰亚胺环,合成聚芳硫醚砜酰亚胺(PASSI),并对单体及聚合物进行表征,通过热分析得出聚合物的玻璃化温度为252.4℃.热分解温度为484.9℃,表明PASSI具有优良的热性能,是一种新型耐热树脂。 相似文献
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从开清棉到成卷,经常会遇到某些金属物如铁钉、细纱钢丝圈等夹入棉卷棉层中,特别是 A076综合打手角钉,有时会脱落混入,如果不及时将这些金属杂物清除掉,会影响棉卷质量,还容易造成事故。为此,我们运用 A272型并条机电气自停原理,在 A076成卷机上试制了金属杂物自停装置。当棉层中混有金属杂物时,成卷机自动停车,避免了 相似文献
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