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用刚果红法和烘箱变色法比较研究了以干混料和塑化料为试样时氰基胍(CG)、硫醇辛基锡(OTM)、硬脂酸钙(CaSt2)和硬脂酸锌(ZnSt2)对PVC的热稳定性能,结果表明:以干混料和塑化料为试样的测试结果存在明显差别,也就是说,以干混料为试样得到的热稳定性能测试结果不能反映实际应用条件下的表现,要获得对实际应用具有指导意义的热稳定性能结果,应以塑化料作为试样进行测试。根据以塑化料为试样的测试结果,CG单独使用时效果不明显,与CaSt2、环氧大豆油(ESBO)并用存在明显的协同效应;CG的热稳定性能与1,3-二甲基-6-氨基尿嘧啶(DMAU)相比还存在较明显的差距,电绝缘性能相当,但透明性能则优于后者。
The effects of cyanidation (CG), octyltin (OTM), calcium stearate (CaSt2) and zinc stearate ZnSt2) on the thermal stability of PVC, the results show that: the test results of dry mix and plasticizer samples as there is a clear difference, that is to say, the dry mix as a sample obtained thermal stability test results can not be reflected The actual performance under the conditions of performance, to obtain the practical application of the guidance of the thermal stability results should be plasticized material as a test sample. According to the test result of plasticized material, the effect of CG alone was not obvious, and there was obvious synergistic effect with CaSt2 and ESBO. The thermal stability of CG was similar to that of 1,3-dimethyl -6-aminouracil (DMAU) compared to there is still a clear gap between the electrical insulation performance, but the transparency is better than the latter.