摘要
应用傅里叶变换红外光谱、裂解气相色谱质谱(PyGC-MS)联用技术鉴定聚对苯二甲酸乙二醇酯(PET)、聚对苯二甲酸丁二醇酯(PBT)、聚对苯二甲酸丙二醇酯(PTT)、聚对苯二甲酸-1,4-环己二甲醇酯(PETG)纤维。结果表明:PET,PBT,PTT,PTEG纤维可以应用红外光谱初步鉴定为聚酯纤维,但4种纤维的红外光谱类似,难以具体鉴别,而该4种纤维的PyGC-MS具有各自的特征裂解产物,其中PET,PBT,PTT的特征裂解产物分别具有100%相对丰度的苯甲酸、对苯二甲酸单丁烯酯、对苯二甲酸单丙烯酯,PETG的特征裂解产物为1,4-二亚甲基-环己烷、2,4,6-辛三烯等,以此4种聚酯特征裂解产物为鉴定PET,PBT,PTT,PTEG纤维的依据。该方法简便、快速、准确,已应用于实际检测。
Polyethylene terephthalate （PET）, polytrimethylene terephthalate （PTT）, polybutylene terephthalate （PBT） and poly 1,4-cyclohexylene dimethylene terephthalate （PETG） fibers were identified by Fourier transform infrared spectroscopy and pyrolysis gas chromatography-mass spectroscopy （PyGC-MS）. The results showed that PET, PBT, PTT and PTEG fibers can be preliminarily identified as polyester fibers by infrared spectroscopy; but these four fibers had so similar infrared spectra that they can not be definitely identified. Based on PyGC-MS observation, these four fibers each had their specific pyrolysis characteristic products, namely, benzoic acid, monobutenyl ester of terephthalic acid and monopropenyl ester of terephthalic acid of 100% relative abundance from PET, PBT and PTT, respectively, and 1,4-dimethyl-cyclohexane and 2,4,6-octatriene for PETG, which provided the reference for definitely identifying these four fibers. This method is convenient, quick and accurate and has been put into practise.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2011年第3期64-66,共3页
China Synthetic Fiber Industry
基金
浙江省分析测试科技项目(2008F70031)
