工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2014年
12期
47-51
,共5页
超高分子量聚乙烯%模压工艺%结晶度%耐磨性能
超高分子量聚乙烯%模壓工藝%結晶度%耐磨性能
초고분자량취을희%모압공예%결정도%내마성능
ultra high molecular weight polyethylene%compression molding%crystallinity%wear resistance
在3.6 MPa的初始模压压力下，分别改变模压温度、模压时间和冷却方式对超高分子量聚乙烯(PE–UHMW)进行了模压成型，研究了PE–UHMW模压成型工艺对其结晶度和耐磨性能的影响。结果表明，在不同的模压温度或模压时间下，PE–UHMW结晶度与耐磨性能的变化没有理想的对应关系；但从整体结果可以得出，较高模压温度或较长的模压时间会导致PE–UHMW结晶度降低，耐磨性能变差。模压温度为230℃、模压时间为30 min时， PE–UHMW的耐磨性能最好。不同冷却方式对PE–UHMW结晶度的影响较小，对耐磨性能的影响较大。采用较低的冷却速率并在PE–UHMW结晶温度下保温30 min，可以得到耐磨性能优异的PE–UHMW。
在3.6 MPa的初始模壓壓力下，分彆改變模壓溫度、模壓時間和冷卻方式對超高分子量聚乙烯(PE–UHMW)進行瞭模壓成型，研究瞭PE–UHMW模壓成型工藝對其結晶度和耐磨性能的影響。結果錶明，在不同的模壓溫度或模壓時間下，PE–UHMW結晶度與耐磨性能的變化沒有理想的對應關繫；但從整體結果可以得齣，較高模壓溫度或較長的模壓時間會導緻PE–UHMW結晶度降低，耐磨性能變差。模壓溫度為230℃、模壓時間為30 min時， PE–UHMW的耐磨性能最好。不同冷卻方式對PE–UHMW結晶度的影響較小，對耐磨性能的影響較大。採用較低的冷卻速率併在PE–UHMW結晶溫度下保溫30 min，可以得到耐磨性能優異的PE–UHMW。
재3.6 MPa적초시모압압력하，분별개변모압온도、모압시간화냉각방식대초고분자량취을희(PE–UHMW)진행료모압성형，연구료PE–UHMW모압성형공예대기결정도화내마성능적영향。결과표명，재불동적모압온도혹모압시간하，PE–UHMW결정도여내마성능적변화몰유이상적대응관계；단종정체결과가이득출，교고모압온도혹교장적모압시간회도치PE–UHMW결정도강저，내마성능변차。모압온도위230℃、모압시간위30 min시， PE–UHMW적내마성능최호。불동냉각방식대PE–UHMW결정도적영향교소，대내마성능적영향교대。채용교저적냉각속솔병재PE–UHMW결정온도하보온30 min，가이득도내마성능우이적PE–UHMW。
Ultra high molecular weight polyethylene (PE-UHMW) was compression-molded through changing compression moulding temperature, time and cooling cycle with initial pressure of 3.6 MPa. The effects of the compression molding process on the crystallinity and wear resistance of PE-UHMW was studied. The results show that under different compression molding time or temperature,there is not an ideal corresponding relationship between the changes of crystallinity and wear resistance. But it is summarized from the results as a whole that the crystallinity and wear resistance all decrease due to the increased compression molding time or temperature. When the compression molding time is 30 min and the temperature is 230℃,the best wear resistance of PE-UHMW is achieved. Different cooling cycles have a little effect on the crystallinity of PE-UHMW,but have great influence on the wear resistance. PE-UHMW with optimun wear resistance can be obtained by adopting a slower cooling rate and keeping the crystallization temperature of PE-UHMW for 30 min in the cooling process.
