CAJ | 학술논문

要:?通过多次挤出透明聚苯乙烯(GPPS),模拟产品再加工,分析了多次挤出对GPPS黄色指数、熔体流动速率、相对分子质量、透光率、残留单体以及低聚物含量等的影响.GPPS残留单体含量,低聚物含量以及在后加工过程中受到高温、高剪切作用时的降解程度和被氧化程度是致使GPPS产品回收利用过程中颜色变黄的主要原因.建议在生产过程中加入少量酚类抗氧剂以改善GPPS产品再加工时颜色变黄的现象.
요:?통과다차제출투명취분을희(GPPS),모의산품재가공,분석료다차제출대GPPS황색지수、용체류동속솔、상대분자질량、투광솔、잔류단체이급저취물함량등적영향.GPPS잔류단체함량,저취물함량이급재후가공과정중수도고온、고전절작용시적강해정도화피양화정도시치사GPPS산품회수이용과정중안색변황적주요원인.건의재생산과정중가입소량분류항양제이개선GPPS산품재가공시안색변황적현상.
@@@@The?effect?of?repeated?extrusion?on?the?yellow?index,?melt?flow?rate,?relative?molecular?mass,?transmittance,?residual?monomer?and?oligomer?content?of?general?purpose?polystyrene?(GPPS)?was?analyzed?by?imitating?re-processing?through?repeated?extrusion?of?GPPS.?The?main?reasons?why?the?GPPS?products?became?yellow?during?recycling?were?residual?monomer?and?oligomer?content?of?GPPS,?and?degradation?degree?and?oxidation?degree?of?GPPS?due?to?high?temperature?and?high?shear?stress?during?post-processing.?It?was?suggested?that?a?small?amount?of?phenolic?antioxidants?should?be?added?in?the?production?of?GPPS?in?order?to?alleviate?yellowing?of?the?product?during?re-processing.