新乡学院学报(自然科学版)
新鄉學院學報(自然科學版)
신향학원학보(자연과학판)
Journal of Xinxiang University(Natural Science Edition)
2013年
2期
98-101
,共4页
ABS%裂解气相色谱质谱法联用%热降解
ABS%裂解氣相色譜質譜法聯用%熱降解
ABS%렬해기상색보질보법련용%열강해
ABS%gas chromatography-mass spectrometry(GC-MS)%thermal degradation
采用裂解气相色谱质谱联用技术对 ABS 塑料的热降解行为进行了研究.在氦气氛围中,500℃下对ABS进行热裂解,通过色谱质谱联用仪对裂解产物进行了定性分析,共鉴定出苯乙烯、甲苯和4-苯基丁腈等31种裂解产物.根据裂解产物信息和有机物热裂解反应的原理对 ABS 的热裂解反应机理作了探讨. ABS 塑料的热降解过程是典型的自由基历程,解释了裂解产物中芳香烃类化合物、脂肪烃类化合物、腈类化合物和含溴酚类化合物的生成机理. ABS的高温降解过程不是三种结构单元降解过程的简单累加,三种结构单元在其降解过程中相互明显影响,最终导致裂解产物在结构和类别上的多样性.废旧塑料 ABS 热裂解过程会产生多种有害污染物,因此,选择合适的裂解工艺条件,既可得到更多有用的裂解产物,又可减少对环境的污染.
採用裂解氣相色譜質譜聯用技術對 ABS 塑料的熱降解行為進行瞭研究.在氦氣氛圍中,500℃下對ABS進行熱裂解,通過色譜質譜聯用儀對裂解產物進行瞭定性分析,共鑒定齣苯乙烯、甲苯和4-苯基丁腈等31種裂解產物.根據裂解產物信息和有機物熱裂解反應的原理對 ABS 的熱裂解反應機理作瞭探討. ABS 塑料的熱降解過程是典型的自由基歷程,解釋瞭裂解產物中芳香烴類化閤物、脂肪烴類化閤物、腈類化閤物和含溴酚類化閤物的生成機理. ABS的高溫降解過程不是三種結構單元降解過程的簡單纍加,三種結構單元在其降解過程中相互明顯影響,最終導緻裂解產物在結構和類彆上的多樣性.廢舊塑料 ABS 熱裂解過程會產生多種有害汙染物,因此,選擇閤適的裂解工藝條件,既可得到更多有用的裂解產物,又可減少對環境的汙染.
채용렬해기상색보질보련용기술대 ABS 소료적열강해행위진행료연구.재양기분위중,500℃하대ABS진행열렬해,통과색보질보련용의대렬해산물진행료정성분석,공감정출분을희、갑분화4-분기정정등31충렬해산물.근거렬해산물신식화유궤물열렬해반응적원리대 ABS 적열렬해반응궤리작료탐토. ABS 소료적열강해과정시전형적자유기역정,해석료렬해산물중방향경류화합물、지방경류화합물、정류화합물화함추분류화합물적생성궤리. ABS적고온강해과정불시삼충결구단원강해과정적간단루가,삼충결구단원재기강해과정중상호명현영향,최종도치렬해산물재결구화유별상적다양성.폐구소료 ABS 열렬해과정회산생다충유해오염물,인차,선택합괄적렬해공예조건,기가득도경다유용적렬해산물,우가감소대배경적오염.
The thermal degradation of ABS is investigated by pyrolysis gas chromatography mass spectrometry (GC-MS) in the presence of helium. GC-MS is used for qualitative analysis of the pyrolysis products of ABS under 500℃. Altogether 31 pyrolysis products are detected, including styrene, toluene and 4-phenyl butyronitrile, etc. Pyrolysis reaction mechanism of ABS is discussed according to the information of pyrolysis products and the reaction principle of organics thermal cracking. The thermal degradation of ABS is a typical radical chain mechanism, and the generation mechanisms of aromatic hydrocarbon, aliphatic hyfrocrbon, acrylic compounds and compounds containing bromophenol are explained. The thermal degradation of ABS is not a simple summation of three structural monomers, because the three constituents interact with each other significantly, the pyrolysis product has variety structures and categories. The pyrolysis products of the thermal degradation of ABS contain a lot of harmful substances, so the suitable technology of pyrolysis should be applied to obtain more useful pyrolysis products and decrease the environment pollution.
