Shanghai Daoqin Plastics Co., Ltd.

through different agent can identification certain plastics, in 2ml hot acid in solvent understanding or 悬浮几 milli Sample, cooling rear add 入3滴50% 硫 acid （由 and other water and concentrated acid made formed ）, 立即观察显 color reaction, in Sample 放置10min rear again Sample color, again in water in will Sample add hot 至100 degree, Sample color. use method can identification lower table/sheet in plastics . color reaction is Liebermann-Storch-Morawski reaction

几 types plastics Liebermann-Storch-Morawski显 color reaction
材 material 立即显 color 10min rear color add hot to 100 degree rear color
酚 aldehyde resin shallow 红紫- powder color color 棕-红 color
polyethylene (PE) alcohol color -淡黄 color color - shallow color color - black
poly acid ethylene ester color - shallow color color color - black
chlorine 化橡胶 黄棕 color color shallow color -黄棕 color
ring oxygen resin color to color color to color color -黄 color
polyurethane ester 柠檬黄 柠檬黄 棕 color -绿荧 light

含 chlorine plastics has polyvinyl chloride (PVC), chlorine polyvinyl chloride (PVC), chlorine plastics raw materials price 橡胶, poly chlorine butadiene, poly chlorine ethylene, polyvinyl chloride (PVC) mixed material and other, it can through 吡啶显 color reaction identification. lower table/sheet. attention/notes, experiment/testing front, material must ether 萃取, remove increase agent, experiment/testing methods: will ether Sample solvent hydrogen 呋喃, 滤 不 solvent formed separation, add alcohol make 之沉淀, rear in front 75 degree below/following drying. will drying a small amount of Sample use 不 1ml吡啶 and reaction, separation rear, add 入2 to 场滴5% hydrogen oxidation 钠 甲 alcohol solvent liquid （1g hydrogen oxidation solvent understanding is 20ml甲 alcohol in ）, 立即观察一 lower color, 5min and 1h rear again separation 别观察 one-time. according to color can identification different chlorine plastics.
nylon can through for 二甲基氨基苯甲 aldehyde color reaction identification. identification lower: in tube/pipe in add hot 0. 1 ～0. 2g
Sample, will hot separation understanding material small 棉花塞 upper, in upper upper concentrated degree is 14% for 二甲基氨基苯 甲 alcohol solvent liquid, again 滴一滴 concentrated salt acid, is nylon 则显示枣红 color.

吡啶 used for chlorine plastics color reaction
材 material and and agent solvent liquid 一起煮沸 and 吡啶煮沸, cooling rear add agent solvent liquid in Sample in add agent solvent liquid and 吡啶, add hot
即刻 5min rear 即刻 5min rear 即刻 5min rear
polyvinyl chloride (PVC) 红-棕 血红, 棕-红 血红, 棕-红 红-棕, 黑沉淀 红-棕 黑- 棕
chlorine polyvinyl chloride (PVC) 血红, 棕-红 棕-红 棕-红 红-棕, 黑沉淀 红-棕 红-棕
chlorine 化橡胶 deep 红-棕 deep 红-棕 黑- 棕 黑- 棕沉淀 茶青-棕 茶青-棕
poly chlorine butadiene white -浑浊 white -浑浊 无 color color white -浑浊 white -浑浊
poly chlorine ethylene 棕-黑 棕-黑沉淀 棕-黑沉淀 黑- 棕沉淀 棕-黑 棕-黑
polyvinyl chloride (PVC) mixed combined material 黄 棕-黑沉淀 white -浑浊 white 沉淀 无 color color

for 二甲基氨基苯甲 aldehyde color reaction can use identification polycarbonate (PC).当显示 color is deep color 时,即 can material is polycarbonate (PC).
elastomer or can use Burchfield显 color reaction identification its types type. methods lower: in tube/pipe in add hot 0.5
g Sample, will generate hot understanding gas material 通入1.5ml试刘(in 100ml甲 alcohol in add 入1g for 二甲基氨基苯甲 aldehyde and 0. 01g
for 苯二酚, slow add hot solvent understanding rear, add 入5ml concentrated salt and 10ml ethylene glycol) in, its color, rear, add 入5ml甲 alcohol dilute solvent liquid, make 之沸腾
3min, again its color. different types type elastomer or

橡胶 Burchfield color reaction 结果见 lower table/sheet:
different types type elastomer or Burchfield显 color reaction 结果
elastomer hot understanding gas and agent 接触处 in 持续沸腾 and add alcohol rear
空白 experiment/testing color color
天然橡胶（ poly 异戊二烯） 黄棕 color 绿-紫-蓝 color
poly butadiene green green
丁基橡胶 黄 color color 至淡紫 color
styrene - butadiene copolymer green green
butadiene - acrylonitrile copolymer color color 至红棕 color
poly chlorine butadiene green green
silicon 橡胶 黄 color color
polyurethane ester elastomer color color
含不 saturated and di polymer can use Wijs solvent liquid identification. solvent liquid made 备: will 6～7ml pure chlorine solvent understanding 于1L醋 acid in made. 检验时, will material solvent understanding in chlorine carbon or for chlorine 苯（ melting point 50oc） in, add Wijs solvent liquid, material belt/tape has di 键, make solvent liquid color.
 

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