Long-Term Properties of Injection-Molded Micro-Parts: Influence of Part Dimensions and Cooling Conditions on Aging Behavior

Long-Term Properties of Injection-Molded Micro-Parts: Influence of Part Dimensions and Cooling Conditions on Aging Behavior
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注塑微型零件的长期性能:零件尺寸和冷却条件对老化行为的影响

DOI:
10.1002/mame.201100379
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发表时间:
--
影响因子:
3.9
通讯作者:
Meister
Meister
中科院分区:
材料科学3区
文献类型:
--
作者:
Drummer;Jungmeier;Meister

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微系统技术中使用的各种聚合物部件都是通过注塑成型生产的。对于这些产品的尺寸和设计,必须考虑材料特性和生命周期中的变化。根据零件的形态和机械长期性能,讨论了尺寸减小的零件或在不同冷却条件下加工的零件的老化行为。结果表明,部件尺寸减小导致更高的后结晶和更高的热氧化降解。这导致机械性能的尺寸依赖性变化。通过应用导热性低的模具材料调整工艺条件可以促进与工艺相关的性能,从而改善长期性能。
A variety of polymer parts used in microsystems technology is produced by injection molding. For dimensioning and design of these products, both the material properties and changes during the life cycle have to be taken into account. The aging behavior of parts with decreasing dimensions or of parts processed under different cooling conditions is discussed in terms of their morphological and mechanical long‐term properties. The results indicate that a decreasing part size leads to higher post‐crystallization and higher thermo‐oxidative degradation. This leads to size‐dependent changes in mechanical properties. Adjusted process conditions by application of thermal low‐conductive mold materials can favor the process‐related properties and thus the long term properties can be improved.
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