当前位置: X-MOL 学术Compos. Part A Appl. Sci. Manuf. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Introducing cryomilling for reliable determination of resin content and degree of cure in structural carbon fibre reinforced thermoset composites
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2018-01-06 , DOI: 10.1016/j.compositesa.2018.01.004
Nessa Fereshteh-Saniee , Neil Reynolds , Catherine A. Kelly , Peter R. Wilson , Mike J. Jenkins , Ken N. Kendall

A novel material preparation method is presented that facilitates accurate measurement of the degree of cure and resin content within carbon fibre reinforced polymer composites (CFRPs). When using conventional specimen preparation for standard thermal analysis, it is demonstrated that the experimentally-obtained enthalpy of reaction and resin content varies significantly between analyses. Measurement uncertainties arise because small specimen volumes are extracted from materials that exhibit both macroscopic inhomogeneity and physical discontinuities. To address this issue, representative sample volumes of aligned CFRPs were first cryogenically milled to develop a homogeneous powder before smaller specimens were extracted. The variation in obtained enthalpy of reaction between analyses was reduced from 23% (for conventional specimen extraction) to 1% following cryomilling. The accuracy in measurement of degree of cure for the compression moulding parts was improved 7 times. Further, subsequent FTIR analysis proved that cryomilling did not affect the final chemical structure of the cured material.



中文翻译:

引入低温铣削以可靠地确定结构碳纤维增强的热固性复合材料中的树脂含量和固化程度

提出了一种新颖的材料制备方法,该方法有助于准确测量碳纤维增强聚合物复合材料(CFRP)中的固化程度和树脂含量。当使用常规样品制备进行标准热分析时,已证明实验获得的反应焓和树脂含量在两次分析之间存在显着差异。由于从表现出宏观不均匀性和物理不连续性的材料中提取了少量样品,因此出现了测量不确定性。为了解决这个问题,首先将对齐的CFRP的代表性样品体积进行低温研磨,以形成均匀的粉末,然后再提取较小的样品。分析之间获得的反应焓的变化从冷冻研磨后的23%(对于常规样品提取)降低到1%。压缩成型部件的固化度的测量精度提高了7倍。此外,随后的FTIR分析证明,低温研磨不会影响固化材料的最终化学结构。

更新日期:2018-01-06
down
wechat
bug