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用刚果红法和烘箱变色法比较研究以干混料和塑化料为试样时苯基脲(PU)、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,PU具有类似于ZnSt2的热稳定特性,属于初效型主热稳定剂,与CaSt2环氧大豆油(ESBO)并用存在明显的协同效应;苯基脲的热稳定性能与1,3-二甲基-6-氨基尿嘧啶(DMAU)相比还存在较明显的差距,但透明性能和电绝缘性能则明显优于后者。
The results of Congo red method and oven colorimetric method were compared to study the effects of phenylurea (PU), octyltin (OTM), calcium stearate (CaSt2) and zinc stearate (ZnSt2 ) On the thermal stability of PVC, the results show that: the dry blend and plasticized material as the test sample results are significantly different, that is, the dry blend as a sample obtained thermal stability test results can not reflect the actual Under the conditions of application performance, to obtain the practical application of the thermal stability of the results of the results should be plasticized material as a test sample. According to the test results of the plasticized material, PU has the thermal stability similar to that of ZnSt2, belongs to the primary effect thermal stabilizer and has obvious synergistic effect with the CaSt2 epoxy soybean oil (ESBO) Compared with DMAU, there is still a significant difference in thermal stability, but the transparency and electrical insulation properties are obviously better than the latter.