刚果红试纸

在马弗炉（200℃）灼烧至草酸全部挥发，滴加（1+1）盐酸，使刚果红试纸由红变蓝色（或调节pH到4左右），除去二氧化碳。

The oxalic acid was cauterize in the muffle at 200 ℃ until fully volatilized . The solution pH was adjusted with drop ( 1 + 1 ) hydrochloric acid ( the congo red test paper change color from red to blue ) to about 4 to remove carbon dioxide .

185℃刚果红试纸变色时间试验证明，纳米复合PVC树脂热分解时间比传统产品延长了近10倍。

Experiments on the transition time of Congo red test paper showed that the thermal decomposition time of nano-PVC composite resin was nearly ten times longer than that of traditional PVC resin .

用刚果红试纸测试含有三月桂酸单丁基锡和二月桂酸二丁基锡的PVC的静态热稳定性和脱HCl温度。

The static thermal stability of PVC with dibutyl tin dilaurate and butyl tin trilaurate was studied via Congo Red Method .

用刚果红试纸及流变仪分别测试了加入月桂酸甲基锡的PVC树脂的动、静态热稳定性和加工性能。

The static thermal stability of PVC was tested by means of Congo Red methed , and the dynamic thermal stability was tested by means of Rheometer .

用刚果红试纸测试加入三月桂酸单丁基锡的PVC的静态热稳定性，用流变仪测试其动态热稳定性。

Thermal stabilizer of butyl tin trilaurate for PVC was studied . The static thermal stability of PVC was tested by means of Congo Red Method , while the dynamic thermal stability was tested by means of brabender rheometer .

以硬脂酸锌作为对照物，通过热老化箱实验法、刚果红试纸法等多种方法对硬脂酰氧基乙酸锌及硬脂酰氧基乙酸锌/硬脂酸钙进行了热稳定性的研究。

And research of thermal stabilizer on zinc acetate-stearic acyloxy and zinc acetate-stearic acyloxy plus calcium stearate by means of test method for thermal aging and Congo red test paper etc is given in the paper .