Theoretical Analysis of Melting Process Polymer with CO2Laser
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摘要: 为了研究聚合物的激光熔融塑化效果,在分析CO2激光对聚合物的光热作用基础上,建立激光融化聚合物理论模型,依据能量守恒和热物理原理,计算推导了激光参数与温度变化的数学关系表达式,并以CO2激光融化典型聚合物为例,数值计算和实验分析激光参数对融化深度的影响。结果表明:聚合物呈现出浅表面融化和深度融化两种特征,选择合适激光参数能够实现由表及里的聚合物整体融化,理论计算的融化深度与实验测量结果较为吻合,利用所建立的理论模型及其相关分析公式,可为探索CO2激光辐照的聚合物塑化成型加工提供理论依据。Abstract: In order to investigate the influence of laser energy on the melting and plasticizing process,a theoretical model for the melting process of polymer material was presented,which is based on the optics-thermal interaction of CO2 laser to polymer material. According to the energy conservation and thermal physics,the mathematical models of laser parameters and temperature was analyzed under CO2 laser irradiating,and the effect relationship between laser parameters and melting depth of typical polymer material was discussed with the methods of numerical calculation and experiment. The obtained results demonstrate that there is the surface and depth melting process characteristic,the reasonably laser processing parameters has the biggest effect for polymer material melting process from outside to inside,and the theoretical results of melting depth fit well with experiments data. Accordingly,the model and formula can provide a theory foundation to control plasticizing and processing of polymer material under CO2 laser irradiating.
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Key words:
- calculations /
- carbon dioxide lasers /
- energy conservation /
- experiments /
- mathematical models
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[1] Bretthauer C,Kauzlaric D. Particle based modeling ofultrasonic plastification with a yield-stress fluid(simulation and experiments) [C]//Proceeding ofMultiscale Materials Modeling Third InternationalConference,Freigurg,2006:917-920 [2] Giboz J,Copponnex T,Mele P. Microinjection moldingof thermal plastic polymers: a review [J]. Journal ofMicromechanics and Microengineering,2007,17 (5):96-109 [3] Tan W S,Zhou J Z,Huang S,et al. Experimentalstudy on laser plasticizing polyamide 12[J]. AdvancedMaterials Research,2012,(472/475):2514-2518 [4] 曾广胜,瞿金平,刘跃军. 纯振动场作用下聚合物熔融塑化过程(Ⅰ)理论模型及熔融机理[J]. 化工学报,2009,3(3):775-781Zeng G S,Qu J P,Liu Y J. Melting process of polymerunder pure vibration force field (Ⅰ) theoretical modeland melting mechanism[J]. CIESC Journal,2009,3(3):775-781 (in Chinese) [5] Salmoria G V,Leite J L,Ahrens C H,et al. Rapidmanufacturing of PA/HDPE blend specimens by selectivelaser sintering: microstructure haracterization[J]. PolymerTesting,2007,26:361-368 [6] Greco A,Maffezzoli A. Polymer melting and polymerpowder sintering by thermal analysis [J]. Journal ofThermal Analysis and Calorimetry,2003,72:1167-1174 [7] Li J M,Liu C,Zhu L Y. The formation and eliminationof polymers bulges in CO 2 laser microfabrication [J].Journal of Materials Science Letters,2009,209:4814-4821 [8] Yi P,Liu Y C,Shi Y J. Effects analysis of ambientconditions on process of laser surface melting[J].Optics & Laser Technology,2011,(8):1411-1419 [9] 孙承伟,陆启生,范正修,等. 激光辐照效应[M]. 北京:国防工业出版社,2002Sun C W,Lu Q S,Fan Z X,et al. Laser irradiationeffect[M]. Beijing:Defense Industry Publisher,2002(in Chinese) [10] 魏在福,查鸿逵,王润文. 激光加热温度场物理分析[J].光学学报,1994,14(4): 355-359Wei Z F,Cha H K,Wang R W. Physical analysis ofthe laser-induced temperature field[J]. Acta OpticaSinica,1994,14(4):355-359 (in Chinese) [11] Dong L,Makradi A,Ahzi S,et al. Three-dimensionaltransient finite element analysis of the selective lasersintering process [J]. Journal of Materials ProcessingTechnology,2009,209(2):700-706 [12] 李俊昌. 激光的衍射及热作用计算[M]. 北京:科学出社,2008:313-317,340-343Li J C. The calculation of laser diffraction and. Beijing:Beijing Science Publisher,2008:313-317,340-343 (in Chinese)
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