高强度热延长聚烯的高温拉伸和爬行性能
1Department of Applied Chemistry, Tokyo University of Agriculture and Technology, Koganei-shi 184-8588, Tokyo, Japan.
Polymers
|February 27, 2026
概括
高强度的热延长聚烯保持了优良的高温性能,包括抗拉强度和抗,即使经过长时间的回火. 这使得它适用于苛刻的工业应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 机械工程 机械工程
背景情况:
- 聚烯 (PP) 是一种具有广泛工业应用的多功能聚合物.
- 了解修改PP的高温机械行为对于先进的材料设计至关重要.
- 热延长聚烯 (PP) 显示了增强热和机械性能的潜力.
研究的目的:
- 研究热延长聚烯 (PP) 的高温拉伸和爬行性能.
- 为了评估120°C的长期回火对延长型PP的机械性能的影响.
- 阐明微观结构与高温机械行为之间的关系.
主要方法:
- 在120°C时进行拉伸测试和爬行测量.
- 动态机械分析 (DMA) 来评估弹性模量.
- 小角度X射线散射 (SAXS) 和差分扫描热量计 (DSC) 用于结构分析.
主要成果:
- 与未延长的PP (8MPa) 相比,热延长的PP在120°C时表现出显著更高的收益应力 (60MPa) 和长时间热 (LA) 延长的PP (102MPa).
- 长长的PP表现出了优异的高温爬行阻力,这是由于抑制了晶体链运动.
- 在拉长的PP中观察到状碎片,而在LA-拉长的PP中在变形过程中被抑制.
结论:
- 热延长聚烯具有优越的高温拉伸和爬行性能,即使经过长时间的回火.
- 独特的变形行为和微观结构特征有助于其在高温下表现出色.
- 这些发现凸显了热延长型PP在需要高温耐受性的工业应用中的潜力.
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