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袁海英等:凝胶注模制备的铝铜坯体脱脂过程及动力学 ·107 程的非等温热失重率曲线的数据进行动力学研究,建 (高建样,周兴灵,曲选辉.YT5硬质合金注射成形新型溶剂 立动力学方程,得出动力学参数.在不同的升温速率 脱脂工艺研究.硬质合金,2007,24(3):153) 下聚合物脱脂反应级数为1,同时活化能在79.86~ [8]Guo S B,Zhang H A,Zhang R F,et al.Research on solvent debinding process of titanium alloy compacts by metal injection 108.63kJ·mol范围内,指前因子反应指数在10°~ molding.Rare Met Mater Eng,2007,36(3):537 10'min,活化能的结果表明反应对温度和动力学比 (郭世柏,张厚安,张荣发,等.钛合金粉末注射成形溶剂脱 较敏感. 脂工艺研究.稀有金属材料与工程,2007,36(3):537) (3)脱脂主要分为两个阶段:在240~350℃的区 9]Zhang L M,Zhang L,Wang L C,et al.Debinding of gelcasting 间内主要是聚合物链段的分解,与饱和环醚结构中含 Al2Os green body.Rare Met Mater Eng,2008,37(Suppl 1): 有氧、氮杂原子和羰基基团之相邻的C一C键容易断 697 (张立明,张丽,王龙光,等.凝胶注模成型陶瓷坯体脱脂过 裂,同时碳取代基易在支链连接处优先断裂:质量变化 程的研究.稀有金属材料与工程,2008,37(增刊1):697) 主要集中在350~470℃温度区间,主要是网状结构的 [0]Wu R,Song J,Zhai G Q,et al.Polymerizable redox initiating 解聚和解交联反应,酯基从端链分解,形成共聚物的羰 systems.Polym Bull,2011 (5):39 基和醛基等基团,同时聚合物长链断裂形成单体等小 (吴蓉,宋瑾,翟光群,等.可聚合的氧化还原引发体系.高 分子结构.脱脂阶段主要产生C02、C0、NO2和H,0挥 分子通报,2011(5):39) 发性气体 0] Bianchi 0,Martins J D N.Fiorio R,et al.Changes in activation energy and kinetic mechanism during EVA crosslinking.Polym Test,2011,30(6):616 参考文献 02] Ashok Kumar N,Ganapathy HS,Kim JS,et al.Preparation of Stampfl J.Liu HC,Nam S W,et al.Rapid prototyping and man- poly 2-hydroxyethyl methacrylate functionalized cabon nanotubes ufacturing by gelcasting of metallic and ceramic slurries.Mater Sci as novel biomaterial nanocomposites.Eur Polym,2008,44 EngA,2002,334(1):187 (3):579 2]Yang J,Yu J,Huang Y.Recent developments in gelcasting of ce- [13]Shao J,Yan R,Chen H,et al.Pyrolysis characteristics and ki- ramics.J Eur Ceram Soc,2011,31(14):2569 netics of sewage sludge by thermogravimetry fourier transform in- B]Jia CC,Bekouche K,Yuan H Y,et al.Non-water-based frared analysis.Energy Fuels,2008,22(1):38 gelcasting of metal powders.Powder Metall Technol,2013,31 04] AlshehriS M,Al-Fawaz A,Ahamad T.Thermal kinetic parame- (3):223 ters and evolved gas analysis (TG-FTIR-MS)for thiourea-form- (贾成厂,卡瑞玛,袁海英,等.金属粉末的非水基凝胶注模 aldehyde based polymer metal complexes.J Anal Appl Pyrol, 成形.粉末治金技术,2013,31(3):223) 2013,101:215 4]Shao H,Liu X,Ji Y,et al.Near-net shape processing of spheri- [15]Jiao L,Xiao H,Wang Q,et al.Thermal degradation character- cal high Nb-TiAl alloy powder by gelcasting.Int Miner Metall istics of rigid polyurethane foam and the volatile products analysis Mater,2013,20(11):1076 with TG-FTIR-MS.Polym Degrad Stab,2013,98(12):2687 5]Huang Y,Yang J.Norel Colloidal Forming of Ceramics.Berlin 16] Gao B S,Chen L,Zhu LL,et al.Thermal properties of hetero- Heidelberg:Springer,2010 cyclic aramid.J Donghua Unir Nat Sci,2011,37(3):272 6]Bednarek P,Szafran M.Thermal decomposition of monosaccha- (高宝山,陈蕾,朱礼梁,等.含杂环的共聚芳香族聚酰胺的 rides derivatives applied in ceramic gelcasting process investigated 热性能.东华大学学报(自然科学版),2011,37(3):272) by the coupled DTA/TG/MS analysis.J Therm Anal Calorim, 07] Nayak P,Mishra D K,Parida D,et al.Polymers from renewable 2012,109(2):773 resources:IX.Interpenetrating polymer networks based on castor 7]Gao J X,Zhou X L,Qu X H.Study of solvent debinding process oil polyurethane poly (hydroxyethyl methacrylate):synthesis, of multicomponent binder in YT5 powder injection molding.Ce- chemical,thermal,and mechanical properties.J Appl Polym mented Carbide,2007,24(3):153 Sci,1997,63(5):671袁海英等: 凝胶注模制备的铝铜坯体脱脂过程及动力学 程的非等温热失重率曲线的数据进行动力学研究,建 立动力学方程,得出动力学参数. 在不同的升温速率 下聚合物脱脂反应级数为 1,同时活化能在 79. 86 ~ 108. 63 kJ·mol - 1 范围内,指前因子反应指数在 106 ~ 107 min - 1,活化能的结果表明反应对温度和动力学比 较敏感. ( 3) 脱脂主要分为两个阶段: 在 240 ~ 350 ℃ 的区 间内主要是聚合物链段的分解,与饱和环醚结构中含 有氧、氮杂原子和羰基基团之相邻的 C—C 键容易断 裂,同时碳取代基易在支链连接处优先断裂; 质量变化 主要集中在 350 ~ 470 ℃温度区间,主要是网状结构的 解聚和解交联反应,酯基从端链分解,形成共聚物的羰 基和醛基等基团,同时聚合物长链断裂形成单体等小 分子结构. 脱脂阶段主要产生 CO2、CO、NO2和 H2O 挥 发性气体. 参 考 文 献 [1] Stampfl J,Liu H C,Nam S W,et al. Rapid prototyping and man￾ufacturing by gelcasting of metallic and ceramic slurries. Mater Sci Eng A,2002,334( 1) : 187 [2] Yang J,Yu J,Huang Y. Recent developments in gelcasting of ce￾ramics. J Eur Ceram Soc,2011,31( 14) : 2569 [3] Jia C C,Bekouche K,Yuan H Y,et al. Non - water - based gelcasting of metal powders. Powder Metall Technol,2013,31 ( 3) : 223 ( 贾成厂,卡瑞玛,袁海英,等. 金属粉末的非水基凝胶注模 成形. 粉末冶金技术,2013,31( 3) : 223) [4] Shao H,Liu X,Ji Y,et al. Near-net shape processing of spheri￾cal high Nb--TiAl alloy powder by gelcasting. Int J Miner Metall Mater,2013,20( 11) : 1076 [5] Huang Y,Yang J. Novel Colloidal Forming of Ceramics. Berlin Heidelberg: Springer,2010 [6] Bednarek P,Szafran M. Thermal decomposition of monosaccha￾rides derivatives applied in ceramic gelcasting process investigated by the coupled DTA /TG /MS analysis. J Therm Anal Calorim, 2012,109( 2) : 773 [7] Gao J X,Zhou X L,Qu X H. Study of solvent debinding process of multicomponent binder in YT5 powder injection molding. Ce￾mented Carbide,2007,24( 3) : 153 ( 高建祥,周兴灵,曲选辉. YT5 硬质合金注射成形新型溶剂 脱脂工艺研究. 硬质合金,2007,24( 3) : 153) [8] Guo S B,Zhang H A,Zhang R F,et al. Research on solvent debinding process of titanium alloy compacts by metal injection molding. Rare Met Mater Eng,2007,36( 3) : 537 ( 郭世柏,张厚安,张荣发,等. 钛合金粉末注射成形溶剂脱 脂工艺研究. 稀有金属材料与工程,2007,36( 3) : 537) [9] Zhang L M,Zhang L,Wang L G,et al. Debinding of gelcasting Al2O3 green body. Rare Met Mater Eng,2008,37 ( Suppl 1 ) : 697 ( 张立明,张丽,王龙光,等. 凝胶注模成型陶瓷坯体脱脂过 程的研究. 稀有金属材料与工程,2008,37( 增刊 1) : 697) [10] Wu R,Song J,Zhai G Q,et al. Polymerizable redox initiating systems. Polym Bull,2011( 5) : 39 ( 吴蓉,宋瑾,翟光群,等. 可聚合的氧化还原引发体系. 高 分子通报,2011( 5) : 39) [11] Bianchi O,Martins J D N,Fiorio R,et al. Changes in activation energy and kinetic mechanism during EVA crosslinking. Polym Test,2011,30( 6) : 616 [12] Ashok Kumar N,Ganapathy H S,Kim J S,et al. Preparation of poly 2-hydroxyethyl methacrylate functionalized carbon nanotubes as novel biomaterial nanocomposites. Eur Polym J,2008,44 ( 3) : 579 [13] Shao J,Yan R,Chen H,et al. Pyrolysis characteristics and ki￾netics of sewage sludge by thermogravimetry fourier transform in￾frared analysis. Energy Fuels,2008,22( 1) : 38 [14] Alshehri S M,Al-Fawaz A,Ahamad T. Thermal kinetic parame￾ters and evolved gas analysis ( TG--FTIR--MS) for thiourea-form￾aldehyde based polymer metal complexes. J Anal Appl Pyrol, 2013,101: 215 [15] Jiao L,Xiao H,Wang Q,et al. Thermal degradation character￾istics of rigid polyurethane foam and the volatile products analysis with TG--FTIR--MS. Polym Degrad Stab,2013,98( 12) : 2687 [16] Gao B S,Chen L,Zhu L L,et al. Thermal properties of hetero￾cyclic aramid. J Donghua Univ Nat Sci,2011,37( 3) : 272 ( 高宝山,陈蕾,朱礼梁,等. 含杂环的共聚芳香族聚酰胺的 热性能. 东华大学学报( 自然科学版) ,2011,37( 3) : 272) [17] Nayak P,Mishra D K,Parida D,et al. Polymers from renewable resources: IX. Interpenetrating polymer networks based on castor oil polyurethane poly ( hydroxyethyl methacrylate ) : synthesis, chemical,thermal,and mechanical properties. J Appl Polym Sci,1997,63( 5) : 671 · 701 ·
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