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首页> 外文期刊>Journal of Applied Polymer Science >Crystallization of Nylon 11 Under Compressive High Strain Rates
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Crystallization of Nylon 11 Under Compressive High Strain Rates

机译：高压缩率下尼龙11的结晶

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摘要

The mechanical behavior of semicrystalline Nylon 11 was studied at strain rates between 10-3 and 8800 S-I. X-ray diffraction and DSC were employed to examirie the crystal structure and the crystallinity content. The as-received material comprised a mixed structure of a predominately triclinic (a) form. DSC revealed that the material gave rise to two melting peaks. The compressive flow stress of Nylon 11 experienced a large increase at 1200 S-I and decreased at higher strain rates. The maximum leve} of the flow stress corresponded with a higher level of crystallinity and a structure mainly of a pseudohexagonal form. The subsequent drop in stress at higher rates was associ- ated with a decrease in the crystallinity content and a mixed crystal structure, different from that observed in the as-received material. After compression, the low melting peak disappeared and the material melted over an increased temperature range.
机译：研究了半结晶尼龙11在10-3至8800 S-1之间的应变速率下的力学行为。用X射线衍射和DSC检查晶体结构和结晶度。如此接收的材料包括主要是三斜晶（a）形式的混合结构。 DSC显示该材料产生两个熔化峰。尼龙11的压缩流动应力在1200 S-1时经历了较大的增加，而在较高的应变速率下则有所降低。流动应力的最大水平对应于较高的结晶度和主要为准六边形形式的结构。随后以较高的速率降低的应力与结晶度和混合晶体结构的降低有关，这与按原样观察到的材料不同。压缩后，低熔点峰消失，材料在升高的温度范围内熔化。

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