Energy absorption mechanism of the semi-crystalline polyolefin during the yield process
半晶聚烯烃屈服过程中的能量吸收机理
基本信息
- 批准号:18550188
- 负责人:
- 金额:$ 2.8万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2006
- 资助国家:日本
- 起止时间:2006 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In this study, we mix the fluorescent reagent which does not form the excimer into polyolefines and investigate the fluorescent behavior in the yield region in-situ during uniaxial tensile deformation. We prepare the samples with different crystallinity to reveal the effects of the structural transformation of the crystalline phases on the fluorescent behavior in the yield region.The intensity of fluorescence takes almost constant value before the yield point. The peak intensity suddenly rises up from the yield point and takes the maximum values around the central point between the yield point and the starting point of the neck propagation, so-called secondary yield point at which the neck portion appeared in the center of sample specimen. The peak intensity takes a constant value again during neck propagation. The excess emission of the fluorescence also increases with the crystallinity.The total fluorescent emission linearly increases with the resilience for the HDPE samples and the iPP samples with the crystallinity over 0.5. This result strongly suggests that the origin of the excess fluorescent emission is the release of the storage energy by the fracture of the lamellae at the yield point.
在本研究中,我们将不形成激基缔合物的荧光试剂混入聚烯烃中,原位研究了单轴拉伸变形过程中屈服区的荧光行为。制备了不同结晶度的样品,研究了晶相结构的变化对屈服区荧光行为的影响,发现在屈服点之前,荧光强度基本保持不变。峰值强度从屈服点突然升高,并在屈服点和颈缩扩展起始点之间的中心点周围取最大值,所谓的二次屈服点,在该二次屈服点处颈缩部分出现在试样的中心。在颈部传播期间,峰值强度再次取恒定值。随着结晶度的增加,荧光的过量发射也增加,当结晶度大于0.5时,HDPE和iPP的总荧光发射随回弹性的增加而线性增加。这一结果有力地表明,过量荧光发射的起源是通过在屈服点处的薄片断裂而释放的储存能量。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
A SAXS study on tensile deformation in semi-crystalline polymers
半结晶聚合物拉伸变形的 SAXS 研究
- DOI:
- 发表时间:2008
- 期刊:
- 影响因子:0
- 作者:Takanobu Kawamura;Koh-hei Nitta
- 通讯作者:Koh-hei Nitta
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NITTA Koh-hei其他文献
Raman Spectroscopic Study of Microscopic Deformation Behavior of Crystalline Polyolefin Solids
结晶聚烯烃固体微观变形行为的拉曼光谱研究
- DOI:
10.1295/koron.2018-0029 - 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
KIDA Takumitsu;HIEJIMA Yusuke;NITTA Koh-hei - 通讯作者:
NITTA Koh-hei
作者の感情表出と鑑賞者への感情喚起
表达艺术家的情感并唤起观众的情感
- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
KIDA Takumitsu;HIEJIMA Yusuke;NITTA Koh-hei;源河亨 - 通讯作者:
源河亨
NITTA Koh-hei的其他文献
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{{ truncateString('NITTA Koh-hei', 18)}}的其他基金
Molecular Dynamics in failure initialtion of polymeric materials
高分子材料失效引发的分子动力学
- 批准号:
16550172 - 财政年份:2004
- 资助金额:
$ 2.8万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Molecular mobility and conductivity in polymeric hybrids hydrogen-bonding with some inorganic fillers such as carbon black, and hindered phenol and amine conpounds.
与一些无机填料(如炭黑、受阻酚和胺化合物)形成氢键的聚合物杂化物中的分子迁移率和电导率。
- 批准号:
13650746 - 财政年份:2001
- 资助金额:
$ 2.8万 - 项目类别:
Grant-in-Aid for Scientific Research (C)