Analysis and assessment on degradation behaviour of firework compositions

• Project/Area Number: 25750136
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Social systems engineering/Safety system
• Research Institution: Yokohama National University
• Principal Investigator: Kumasaki Mieko 横浜国立大学, 環境情報研究科(研究院), 准教授 (70358430)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 劣化 / 煙火 / 湿度

Outline of Final Research Achievements

The mixture of ammonium Perchlorate and magnesium chloride was investigated to analyse degradation behaviour and physical change of firework compositions. For the investigation, a humidity controlled environment chamber was prepared and the measurement protocol was established. The measurement clarified the occurrence of a reversible process of water absorption and an irreversible process of chemical reactions. The results implied the generation of sodium hydroxide and the reduction process of perchlorate. Cracks due to volume change was observed as well as density change. The weight change had a greater rate than volume change. Changes were also found between before and after the degradation in combustion test.

Research Products

• [Presentation] AP/Mg系煙火の吸湿状態が燃焼に与える影響 (2016)
  • Author(s): 西脇洋佑，松永猛裕，熊崎美枝子
  • Organizer: 火薬学会2016年度春季研究発表会
  • Place of Presentation: 学院大学青山キャンパス総研ビル
  • Year and Date: 2016-05-27
• [Presentation] AP系煙火の劣化に与える湿気の影響 (2015)
  • Author(s): 西脇洋佑，松永猛裕，熊崎美枝子
  • Organizer: 火薬学会2015年度秋季研究発表会
  • Place of Presentation: 公立学校共催組合別府保養所・豊泉荘
  • Year and Date: 2015-12-10
• [Presentation] AP系煙火の形状に水分が与える影響 (2015)
  • Author(s): 西脇洋佑，澁谷忠弘，松永猛裕，熊崎美枝子
  • Organizer: 火薬学会2015年度秋季研究発表会
  • Place of Presentation: 公立学校共催組合別府保養所・豊泉荘
  • Year and Date: 2015-12-10
• [Presentation] 煙火可燃剤の吸湿挙動に関する実験的研究 (2015)
  • Author(s): 西脇 洋佑，松永 猛裕，熊崎 美枝子
  • Organizer: 火薬学会2015年度春季研究発表会
  • Place of Presentation: 慶應義塾大学日吉キャンパス
  • Year and Date: 2015-05-28 – 2015-05-29
• [Presentation] 煙火可燃剤の吸湿挙動に関する実験的研究 (2015)
  • Author(s): 西脇洋佑，松永猛裕，熊崎美枝子
  • Organizer: 火薬学会2015年度春季研究発表会
  • Place of Presentation: 慶應義塾大学日吉キャンパス協生館
  • Year and Date: 2015-05-28
• [Presentation] 調湿環境下におけるAP/Mgの変質に関する検討 (2013)
  • Author(s): 神明奈央，松永猛裕，秋吉美也子，熊崎美枝子，三宅淳巳
  • Organizer: 火薬学会 2013年度春季研究発表会
  • Place of Presentation: 慶應義塾大学 日吉キャンパス 協生館
• [Presentation] Mechanism of aging of ammonium perchlorate/magnesium under controlled humidity conditions (2013)
  • Author(s): Nao JIMMEI, Takehiro MATSUNAGA, Mieko KUMASAKI
  • Organizer: Asia Pacific Safety Symposium 2013
  • Place of Presentation: Orchard Hotel, Singapore