摘要
研究了以高锰酸钾或重铬酸钾／水／浓硫酸＝５∶８∶１００（质量比）或２０％（质量分数）的过硫酸铵水溶液及氯化铁或硫酸铜作为催化剂对聚烯烃进行的表面氧化处理，并通过熔点和红外光谱及光电子能谱等方法对氧化反应和产品的结构进行了表征。研究表明，最佳氧化温度和时间分别为４５℃～６０℃与４５ｍｉｎ；用ＫＭｎＯ４／Ｈ２ＳＯ４／ＦｅＣｌ３／ＣｕＳＯ４，Ｋ２Ｃｒ２Ｏ７／Ｈ２ＳＯ４／ＦｅＣｌ３，Ｋ２Ｃｒ２Ｏ７／Ｈ２ＳＯ４／ＣｕＳＯ４体系对聚乙烯的氧化中，氧化深度依次减小，Ｃ原子的摩尔分数由未氧化时的８０．８０４％，分别降低为３１．９０７％、６９．９０５％和７８．６６９％；在ＦｅＣｌ３催化下，产品中Ｃｌ的含量普遍增加，而以ＫＭｎＯ４／Ｈ２ＳＯ４／ＦｅＣｌ３／ＣｕＳＯ４氧化时增加最多，但对Ｋ２Ｃｒ２Ｏ７／Ｈ２ＳＯ４／ＦｅＣｌ３氧化体系。
The surface oxdation of polyolefine by KMnO4/H2SO4,K2Cr2O7/H2SO4 or (NH4)2S2O8 solution or catalysts FeCl3 or CuSO4 has been studied.The structure of the product was characterized by IR and XPS spectra and melting point test.It is found that the preferred reaction condition is about 4560 and 45min. C content in the oxidation systems of polyethylene decreased from that of 80804% to 31907%,69 905% and 78669% by the catalysts of KMnO4/H2SO4/FeCl3/CuSO4, K2Cr2O7/H2SO4/FeCl3 and K2Cr2O7/H2SO4/CuSO4 respectively.The Cl content in all the oxidized sample increased by FeCl3 catalysis,This revealed that the chloration maybe took place. For K2Cr2O7/H2SO4/FeCl3 oxidation system the O content in the oxidized sample increased much more.
出处
《化学工业与工程》
CAS
1999年第4期207-213,共7页
Chemical Industry and Engineering
关键词
聚烯烃
表面氧化
结构
surface oxidation,polyolefine,structure,reaction
