研究了LLDPE g GMA (甲基丙烯酸缩水甘油酯 )对PA66/PE相容性的影响。结果表明LLDPE g GMA是PA66/PE合金良好的反应型增容剂 ,对于PA66/PE合金 ,LLDPE g GMA的加入使合金的拉伸强度、弯曲强度、Izod缺口冲击强度有明显提高。但刚性和耐...研究了LLDPE g GMA (甲基丙烯酸缩水甘油酯 )对PA66/PE相容性的影响。结果表明LLDPE g GMA是PA66/PE合金良好的反应型增容剂 ,对于PA66/PE合金 ,LLDPE g GMA的加入使合金的拉伸强度、弯曲强度、Izod缺口冲击强度有明显提高。但刚性和耐热性略有降低 ,并且DMA谱图证实了LLDPE g GMA对PA66/PE的反应增容作用 。展开更多
The present study was built upon a previous study on the new generation video game, exergame, in elementary school physical education （PE）. The purpose of the study was to examine the effect of exergames on elementa...The present study was built upon a previous study on the new generation video game, exergame, in elementary school physical education （PE）. The purpose of the study was to examine the effect of exergames on elementary children＇s in-class physical activity （PA） intensity levels and perceived situational interest over time. The results indicated that students＇ situational interest dropped dramatically over two semesters, but their PA intensity increased over time. The results showed that boys and girls were equally active in the exergaming lessons, but boys perceived their gaming experiences more enjoyable than girls did. The findings suggest that exergames may be a possible means to enhance PA in PE. However, whether exergaming is a sustainable way to motivate children in PA is questionable.展开更多
文摘研究了LLDPE g GMA (甲基丙烯酸缩水甘油酯 )对PA66/PE相容性的影响。结果表明LLDPE g GMA是PA66/PE合金良好的反应型增容剂 ,对于PA66/PE合金 ,LLDPE g GMA的加入使合金的拉伸强度、弯曲强度、Izod缺口冲击强度有明显提高。但刚性和耐热性略有降低 ,并且DMA谱图证实了LLDPE g GMA对PA66/PE的反应增容作用 。
文摘The present study was built upon a previous study on the new generation video game, exergame, in elementary school physical education （PE）. The purpose of the study was to examine the effect of exergames on elementary children＇s in-class physical activity （PA） intensity levels and perceived situational interest over time. The results indicated that students＇ situational interest dropped dramatically over two semesters, but their PA intensity increased over time. The results showed that boys and girls were equally active in the exergaming lessons, but boys perceived their gaming experiences more enjoyable than girls did. The findings suggest that exergames may be a possible means to enhance PA in PE. However, whether exergaming is a sustainable way to motivate children in PA is questionable.
