| 高温稳定的不溶性硫黄IS-HS系列 |
| High-temperature Stable Insoluble Sulfur IS-HS |
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| DOI： |
| 中文关键词: 不溶性硫 聚合硫 稳定性 |
| 英文关键词: insoluble sulfur polymeric sulfur stability |
| 基金项目: |
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| 中文摘要: |
| 介绍了高温稳定的不溶性硫黄IS-HS系列新产品，并依据硫化学及斜方硫聚合原理分析了不溶性硫黄的制备方法以及返原为可溶性硫黄的物理和化学原因。这种经高温稳定剂PEF处理的IS-HS系列产品在105℃温度下经受25min的热作用后的高温稳定性（不溶性硫质量占元素硫质量的分数）达90%以上，而普通不溶性硫黄约降至57%。考察了碱性物质对稳定性的影响，其中胺类物质的促进返原能力表现为，促进剂胍类（DPG）＞次磺酰胺类（CZ，DZ，OTOS，NOBS）＞秋兰姆类（TMTD）＞噻唑类（M，DM），防老剂酮胺类（RD）＞对苯二胺类（4010NA）＞萘胺类（A），常用干燥性二、三、四价金属氧化物对其稳定性无明显影响。提出了配方设计中对含不溶性硫黄胶料喷硫可能性的测算方法。 |
| 英文摘要: |
| The new types of insoluble sulfur IS-HS were int roduced. The preperation of insoluble sulfur and the physico-chemical causes of its reversion to soluble sulfur were discussed based on the sulfur chemistry and the polymerization mechanism of rhombic sulfur. The stablity of new IS-HS products which had been treated with high-temperature stabilizer PEF reached over 90%（final IS content based on element S）after exposure at 105℃ for 25 min. In contrast，the stability of convensional insoluble sulfur was only about 57%. The effect of basic compounds on the stability was investigated. The results showed that the order of amines affecting the reversion was as follows：diphenylguanidine accelerators（DPG）＞sulfenamides（CZ，DZ，OTOS，NOBS）＞thiurams（TMTD）＞thiazoles（M，MBTS），keto-amine antioxidants（RD）＞terephthalic diamines（4010NA）＞naphthylamines（A）；the common dried bi，tri or tetravalent metal oxides didn′t show significant effect on the stability. A method for predicting bloom possibility of IS-containing compound in the formula design was proposed. |
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