Study on the mechanical alloying of metal and polymer

金属与聚合物的机械合金化研究

• 批准号: 12650661
• 负责人: SAKAKIBARA Akira
• 金额: $ 2.37万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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/grant/KAKENHI-PROJECT-12650661/
• 关键词: mechanical alloyine; magnesium; polymer; Teflon; dehalogrenation; メカノケミストリ

The automatic mortar used for preliminary experiment for open system milling was capable of refining the powder, but could not achieve the alloying of Mg-Al mixed powder and the reaction of Mg-PTFE. The capability of the vibration ball-mill was sufficient both for refining and alloying compared with the planetary ball-mill. Mg powder and PTFE powder reacted explosively during milling with vibration ball-mill. MgF_2 was found in the solid product by XRD, but hardly any fluorine was detected in the gas product by an absorption spectrophotometry. The milling time to the explosive reaction decreased with the ratio of Mg to PTFE. Using the Mg powder mechanically ground before milling with PTFE shortened the time to the explosion. Ni powder was mixed to suppress the explosion, but marked effect was not recognized. Mechanical alloying of Mg powder and Ni powder was carried out before the milling with PTFE, and then the time to the explosion decreased remarkably and the scale of explosion judged from the explosive sound, but explosion could not be halted. Refining the Mg and Ni powder is considered to prompt the reaction and the intermetallic compounds, MgNi_2 and MgNi_3, formed by the milling may act as catalyst and moderate the explosion reaction. Reaction became more complex in this case where MgNi3Cx was also found in the product. PVC did not react either with Mg powder or with the Mg-Ni mixed powder, so dechrolination was not carried out. Suppression of the explosion by Mg-PTFE milling and achievement of dechrolination by Mg-PVC milling require further investigation of more efffective catalytic argent.

用于开放式球磨初步实验的自动砂浆能够对粉末进行细化，但不能实现镁铝混合粉末的合金化和镁聚四氟乙烯的反应。与行星球磨机相比，振动球磨机具有足够的精炼和合金化能力。在振动球磨机的球磨过程中，镁粉和聚四氟乙烯粉发生了爆炸反应。用X射线衍射法在固体产物中发现了MgF_2，而用吸收光谱分析几乎没有检测到气体产物中的氟。球磨至爆炸反应的时间随镁与聚四氟乙烯比例的增加而缩短。用聚四氟乙烯球磨前先机械研磨镁粉，缩短了爆炸时间。为了抑制爆炸，掺入了镍粉，但效果不明显。在聚四氟乙烯球磨前对镁粉和镍粉进行机械合金化，爆炸时间显著缩短，从爆音判断爆炸规模，但爆炸无法停止。认为细化镁、镍粉可促进反应，球磨形成的金属间化合物镁镍和镁镍可起催化剂作用，对爆炸反应起到缓和作用。在这种情况下，反应变得更加复杂，在产品中也发现了MgNi3Cx。聚氯乙烯既不与镁粉反应，也不与镁镍混合粉反应，因此不能进行脱铬。用镁-聚四氟乙烯球磨抑制爆炸，用镁-聚氯乙烯球磨实现脱铬，需要进一步研究更有效的催化银剂。