Development of a New Evaluation Method for Thermal Degradation and Incineration Behaviorof Polymeric Materials

高分子材料热降解和焚烧行为评价新方法的开发

• 批准号: 12450337
• 负责人: TSUGE Shin
• 金额: $ 9.34万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450337/
• 关键词: Pvrolvsis; Engineering Plastics; Polycarbonate Resins; Organic Alkali; Pyrolvsis-Gas Chromatography; Tetramethvlammonium Hydroxide; Silicone Flame Retardant; Cross-linking Structure; シリコーン系難燃剤; ポリカーボネート; 分岐; キサントン

As a basic research for development of a new evaluation method for thermal degradation and incineration behavior of polymeric materials, pyrolysis-gas chromatography in the presence of an organic alkali was applied to verify the branching and/or cross-linking structures in polycarbonates (PCs) formediduring theinthermal treatment. On the pyrogram of the thermally itreated PC sample at 300゜C for 3 hours, >the'peakscreflecting the abnormal structures such as branching and/or cross-linking were observed together,with those reflecting main chain,. On the basis of the observed results, the possible abnormal structures in thermally treated.PCs were discussed in detail. Next, in order to clarify the actions of the silicone flame retardant, the change in the chemical structure of silicone-containing flame retarded polycarbonate (FR-PC) during thermal treatment at 380ーC was Investigated by Py-GC in the presence of an organic alkali. On the pyrograms of thermally treated FR-PC, some characteristic peaks reflecting the formation of cross-linking structures were clearly observed. This result suggests that thermal decomposition of FR-PC was strongly suppressed by the formation of cross-linking structures, which should cause flame retarding effect in the materials.

作为开发评价聚合物材料热降解和焚烧行为的新方法的基础研究，采用有机碱存在下的热解-气相色谱法验证了聚碳酸酯（PC）在热处理过程中形成的支化和/或交联结构。在300 ℃下热处理3小时的PC样品的热解图上，同时观察到反映异常结构如支化和/或交联的峰，以及反映主链的峰。根据观察结果，对热处理后的聚碳酸酯中可能出现的异常结构进行了详细的讨论。接下来，为了阐明有机硅阻燃剂的作用，在有机碱的存在下，通过Py-GC研究了含有机硅的阻燃聚碳酸酯（FR-PC）在380 ℃下热处理期间化学结构的变化。在热处理的FR-PC的热解图上，可以清楚地观察到一些反映交联结构形成的特征峰。这一结果表明，FR-PC的热分解被强烈抑制的交联结构的形成，这应该引起阻燃效果的材料。