.192, 北京科技大学学报 第29卷 Double scale simulation of the cooling stage of semi-crystalline polymer melt ZHOU Yingguo,SHEN Changyu,CHEN Jingbo National Engineering Research Center for Advanced Polymer Processing Technology,Zhengchou University.Zhenghou 450002.China ABSTRACI The crystallization behavior of a polymer is simultaneously influenced by temperature and temper- ature experience,but its temperature field is dependent on crystallization.A coupling analysis of cooling and crystallization process was carried out to exactly simulate the temperature field and crystallization behavior of se- mi-crystalline polymer melt.In the coupling method the result of temperature field was considered as the input of crystallization analysis and then the result of spherulites evolution was used as the input of temperature field simulation,so simulation results of the double scales,macroscopic and mesoscopic,was obtained at the same time.Because the coupling analysis has the physical background,the result of numerical simulation can be thought reasonable. KEY WORDS polymer melt:semi-crystallization:cooling process:double scale;simulation:temperature field;spherulite (上接第185页) Tribological behavior of PEEK composites filled with various surface modified whiskers WANG Huaiyuan,FENG Xin,SHI Yijun,LU Xiaohua Chemical Engineering School.Nanjing University of Technology.Nanjing 210009.China ABSTRACT Modification of potassium titanate whiskers(PTW)by solgel,FSO and NDZ-102 methods was studied.The water contact angle of modified PTW and the friction and wear properties of PEEK composites filled with various modified PTW were investigated.The worn surfaces and transfer films were observed by SEM and optical microscope,and the abrasion mechanism of PEEK composites filled with modified PTW was discussed.The results show that the water contact angle of PTW is improved after surface modification,and the highest is FSO modification.The friction coefficient of PEEK composites filled with modified PTW decreases, and the wear resistances of PEEK composites filled with FSO and sol gel modified PTW are better than that without modification,which increases the wear resistance 2.64 and 2.11 times respectively under 300N.But NDZ-102 decreases the wear resistance of PEEK composites. KEY WORDS PEEK;potassium titanate whisker;surface modification;friction and wear;sol gelDouble scale simulation of the cooling stage of sem-i crystalline polymer melt ZHOU Y ingguo‚SHEN Changyu‚CHEN Jingbo National Engineering Research Center for Advanced Polymer Processing Technology‚Zhengzhou University‚Zhengzhou450002‚China ABSTRACT The crystallization behavior of a polymer is simultaneously influenced by temperature and temper￾ature experience‚but its temperature field is dependent on crystallization．A coupling analysis of cooling and crystallization process was carried out to exactly simulate the temperature field and crystallization behavior of se￾m-i crystalline polymer melt．In the coupling method the result of temperature field was considered as the input of crystallization analysis and then the result of spherulites evolution was used as the input of temperature field simulation‚so simulation results of the double scales‚macroscopic and mesoscopic‚was obtained at the same time．Because the coupling analysis has the physical background‚the result of numerical simulation can be thought reasonable． KEY WORDS polymer melt；sem-i crystallization；cooling process；double scale；simulation；temperature field；spherulite （上接第185页） Tribological behavior of PEEK composites filled with various surface modified whiskers WA NG Huaiyuan‚FENG Xin‚SHI Y ijun‚LU Xiaohua Chemical Engineering School‚Nanjing University of Technology‚Nanjing210009‚China ABSTRACT Modification of potassium titanate whiskers （PT W） by sol—gel‚FSO and NDZ—102methods was studied．The water contact angle of modified PT W and the friction and wear properties of PEEK composites filled with various modified PT W were investigated．The worn surfaces and transfer films were observed by SEM and optical microscope‚and the abrasion mechanism of PEEK composites filled with modified PT W was discussed．The results show that the water contact angle of PT W is improved after surface modification‚and the highest is FSO modification．The friction coefficient of PEEK composites filled with modified PT W decreases‚ and the wear resistances of PEEK composites filled with FSO and sol—gel modified PT W are better than that without modification‚which increases the wear resistance2∙64and2∙11times respectively under 300N．But NDZ—102decreases the wear resistance of PEEK composites． KEY WORDS PEEK；potassium titanate whisker；surface modification；friction and wear；sol—gel ·192· 北 京 科 技 大 学 学 报 第29卷