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第2期 周应国等:半结晶性聚合物熔体冷却过程双尺度模拟 .191. 解决理论分析难以实现的问题,另一方面也得出数 lization in injection molded thermoplastics.Polym Eng Sci.2001. 值计算与理论计算之间的差距如何,事实上,该方 41(11):1996 [8]Nakamura K.Watanable T,Katayama K,et al.Some aspects of 法可以很容易地拓展到聚合物在复杂流场的情况, non isothermal crystallization of polymers.I.Relation between 在实际生产中,聚合物结晶又将受到压力、剪切力等 crystallization temperature,crystallinity and cooling conditions.J 的影响,其结晶的生长可能不仅仅为球晶,若能在介 Appl Polym Sci.1972.16:1077 观层面上对这些加以精确的描述,则本文的方法可 [9]Di Lorenzo M L.Silvestre C.Nonisothermal crystallization of 以很容易得到应用,但这方面的基础研究还有待继 polymers.Prog Polym Sci,1999.24:917 续,宏观和介观单个尺度上的模拟均有待深化,多尺 [10]殷敬华,莫志深.现代高分子物理学(上)·北京:科学出版 社,2001:101 度模拟能够促进各个尺度的模拟,各个尺度模拟的 [11]Kim C Y,Kim YC.Kim S C.Temperature dependence of the 进步也将毫无疑问的促进多尺度模拟的发展, nucleation effect of sorbitol derivatives on polypropylene crystal- (③)由于条件所限,与实际加工中的聚合物冷 lization.Polym Eng Sci.1993.33:1445 却过程完全对应的实验目前难以实现,现有的非等 [12]Angelloz C,Fulchiron R,Douillard A,et al.Crystallization of 温结晶的实验研究一般是在确定的降温速率下进行 isotactic polypropylene under high pressure (y phase).Macro- molecules,2000,33:4138 的,这与实际温度场分布存在差异,由于采用的理 13]Mubarak Y,Harkin-Jones E M A:Martin P J,et al.Model of 论模型本身从实验和理论分析中来,有较强的理论 non isothermal crystallization kinetics of isotactic polypropylene. 背景,故采用数值模拟这样一条介于实验与理论分 Polymer,2001.42:3171 析之间的途径可对实验条件所限以及理论上较难得 [14]Hoffman J D.Lauritzen J I.Crystallization of bulk polymers 到解析解的问题提供合理的补充,从而在受条件限 with chain folding:theory of growth of lamellar spherulites.J Res Natl Bur Stand.1961.65A:297 制的情况下,为研究提供依据和思路, [15]Li YY,Cui JZ.The multi-scale computational method for the 参考文献 mechanics parameters of the materials with random distribution of multi-scale grains.Compos Sci Technol,2005.65:1447 [1]陶文铨,数值传热学.2版,西安:西安交通大学出版社, [16]Rafii-Tabara H.Chirazib A.Multi-scale computational modeling 2001.1 of solidification phenomena.Phys Rep,2002,365:145 [2]Kim K H.Isayev A I.Kwon K.Flow induced crystallization in [17]刘儒勋,舒其望.计算流体力学的若干新方法.北京:科学 the injection molding of polymers:a thermodynamic approach.J 出版社,2003.13 Appl Polym Sci.2005,95(3):502 [18]Lamberti G,Titomanlio G.Interaction between light and crys- [3]Pantani R.Coccorullo I.Sperarza V,et al.Modeling of mor- tallizing polymer:a simulation study.Eur Polym J.2005.41: phology evolution in the injection molding process of thermoplastic 2055 polymers.Prog Polym Sci.2005.30,1185 [19]Carvalho B D.Bretas R ES.Quiescent crystallization kinetics [4]Tanner R I.Qi F Z.A comparison of some models for describing and morphology of i PP res.l nonisothermal erystallization as polymer crystallization at low deformation rates.J.Non Newtoni- a function of molecular weight.J Appl Polym Sci.1999.72. an1 id Mech,2005,127,131 1733 [5]Hieber C A.Modeling/simulating the injection molding of isotac- [20]Carvalho B D.Bretas R E S.Quiescent crystallization kinetics tic polypropylene-Polym Eng Sci.2002.42(7):1387 and morphology of i PP res.nonisothermal crystallization of [6]Zuidema H.Peters G W M.Meijer H E H.Influence of cooling the heterophasic and grafted polymers.JAppl Polym Sci.1999. rate on PVT-data of semi-crystalline polymers.J Appl Polym Sci. 72:1741 2001,82(5):1170 [21]Huang T,Kamal M R.Morphological modeling of polymer so- [7]Guo J,Narh K A.Computer simulation of stress induced crystal- lidification.Polym Eng Sci,2000.40(8):1796解决理论分析难以实现的问题‚另一方面也得出数 值计算与理论计算之间的差距如何.事实上‚该方 法可以很容易地拓展到聚合物在复杂流场的情况. 在实际生产中‚聚合物结晶又将受到压力、剪切力等 的影响‚其结晶的生长可能不仅仅为球晶‚若能在介 观层面上对这些加以精确的描述‚则本文的方法可 以很容易得到应用.但这方面的基础研究还有待继 续‚宏观和介观单个尺度上的模拟均有待深化‚多尺 度模拟能够促进各个尺度的模拟‚各个尺度模拟的 进步也将毫无疑问的促进多尺度模拟的发展. (3) 由于条件所限‚与实际加工中的聚合物冷 却过程完全对应的实验目前难以实现‚现有的非等 温结晶的实验研究一般是在确定的降温速率下进行 的‚这与实际温度场分布存在差异.由于采用的理 论模型本身从实验和理论分析中来‚有较强的理论 背景‚故采用数值模拟这样一条介于实验与理论分 析之间的途径可对实验条件所限以及理论上较难得 到解析解的问题提供合理的补充‚从而在受条件限 制的情况下‚为研究提供依据和思路. 参 考 文 献 [1] 陶文铨.数值传热学.2版.西安:西安交通大学出版社‚ 2001:1 [2] Kim K H‚Isayev A I‚Kwon K.Flow-induced crystallization in the injection molding of polymers:a thermodynamic approach.J Appl Polym Sci‚2005‚95(3):502 [3] Pantani R‚Coccorullo I‚Speranza V‚et al.Modeling of mor￾phology evolution in the injection molding process of thermoplastic polymers.Prog Polym Sci‚2005‚30:1185 [4] Tanner R I‚Qi F Z.A comparison of some models for describing polymer crystallization at low deformation rates.J.Non Newtoni￾an Fluid Mech‚2005‚127:131 [5] Hieber C A.Modeling/simulating the injection molding of isotac￾tic polypropylene.Polym Eng Sci‚2002‚42(7):1387 [6] Zuidema H‚Peters G W M‚Meijer H E H.Influence of cooling rate on PVT-data of sem-i crystalline polymers.J Appl Polym Sci‚ 2001‚82(5):1170 [7] Guo J‚Narh K A.Computer simulation of stress-induced crystal￾lization in injection molded thermoplastics.Polym Eng Sci‚2001‚ 41(11):1996 [8] Nakamura K‚Watanable T‚Katayama K‚et al.Some aspects of non-isothermal crystallization of polymers.Ⅰ.Relation between crystallization temperature‚crystallinity and cooling conditions.J Appl Polym Sci‚1972‚16:1077 [9] Di Lorenzo M L‚Silvestre C.Non-isothermal crystallization of polymers.Prog Polym Sci‚1999‚24:917 [10] 殷敬华‚莫志深.现代高分子物理学(上).北京:科学出版 社‚2001:101 [11] Kim C Y‚Kim Y C‚Kim S C.Temperature dependence of the nucleation effect of sorbitol derivatives on polypropylene crystal￾lization.Polym Eng Sci‚1993‚33:1445 [12] Angelloz C‚Fulchiron R‚Douillard A‚et al.Crystallization of isotactic polypropylene under high pressure (γphase).Macro￾molecules‚2000‚33:4138 [13] Mubarak Y‚Harkin-Jones E M A‚Martin P J‚et al.Model of non-isothermal crystallization kinetics of isotactic polypropylene. Polymer‚2001‚42:3171 [14] Hoffman J D‚Lauritzen J I.Crystallization of bulk polymers with chain folding:theory of growth of lamellar spherulites.J Res Natl Bur Stand‚1961‚65A:297 [15] Li Y Y‚Cui J Z.The mult-i scale computational method for the mechanics parameters of the materials with random distribution of mult-i scale grains.Compos Sci Technol‚2005‚65:1447 [16] Rafi-i Tabara H‚Chirazib A.Mult-i scale computational modeling of solidification phenomena.Phys Rep‚2002‚365:145 [17] 刘儒勋‚舒其望.计算流体力学的若干新方法.北京:科学 出版社‚2003:13 [18] Lamberti G‚Titomanlio G.Interaction between light and crys￾tallizing polymer:a simulation study.Eur Polym J‚2005‚41: 2055 [19] Carvalho B D‚Bretas R E S.Quiescent crystallization kinetics and morphology of i—PP res.Ⅱ nonisothermal crystallization as a function of molecular weight.J Appl Polym Sci‚1999‚72: 1733 [20] Carvalho B D‚Bretas R E S.Quiescent crystallization kinetics and morphology of i—PP res.Ⅲ nonisothermal crystallization of the heterophasic and grafted polymers.J Appl Polym Sci‚1999‚ 72:1741 [21] Huang T‚Kamal M R.Morphological modeling of polymer so￾lidification.Polym Eng Sci‚2000‚40(8):1796 第2期 周应国等: 半结晶性聚合物熔体冷却过程双尺度模拟 ·191·
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