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Development and characterization of single polymer composites prepared by compression molding of polyamide 6 empty microcapsules and novel woven textile structures
Materials Today Communications ( IF 3.8 ) Pub Date : 2020-01-09 , DOI: 10.1016/j.mtcomm.2020.100912
Shafagh. D. Tohidi , Nadya Dencheva , Zlatan Denchev , Ana Maria Rocha , Bernhard Engesser

In the present study, novel polyamide 6 based woven single polymer composites (WSPC) were developed by powder-coating of woven textile structures with polyamide 6 empty microcapsules (EMC) and subsequent compression molding. To synthesize EMC, activated anionic ring-opening polymerization of ε-caprolactam by solution/precipitation was applied. Stitched plain fabrics that are promising novel class of woven fabrics and two conventional woven patterns (plain and satin-5 harness) were used as textile reinforcements. The thermal and mechanical properties of all composites were characterized and related to the reinforcements´ morphology, fiber volume fraction and ply orientation. For better understanding of the bonding state at the matrix-fiber interface, stereo-optical microscopy and SEM image analysis by image processing were performed. The data obtained confirmed the existence of a transcrystalline layer (TCL) in the interface region. The mechanical behavior of the composites was related also to the PA6 polymorph content of the samples and their crystallinity indexes determined by wide-angle X-ray diffraction experiments.



中文翻译:

通过聚酰胺6空微胶囊和新型机织织物的压缩成型制备的单一聚合物复合材料的开发和表征

在本研究中,通过用聚酰胺6空微胶囊(EMC)对机织织物结构进行粉末喷涂并随后进行压模,开发了新型基于聚酰胺6的机织单聚合物复合材料(WSPC)。为了合成EMC,通过溶液/沉淀进行ε-己内酰胺的活化阴离子开环聚合。缝制的平纹织物有望成为新型的机织织物,并采用两种传统的机织图案(普通和缎纹5束带)作为织物增强材料。表征了所有复合材料的热和机械性能,并与增强材料的形态,纤维体积分数和层取向有关。为了更好地了解基体-纤维界面处的结合状态,进行了立体光学显微镜和通过图像处理的SEM图像分析。获得的数据证实了界面区域中存在一个跨晶层(TCL)。复合材料的机械性能还与样品中PA6多晶型物含量及其结晶度指标有关,这些结晶度指标是通过广角X射线衍射实验确定的。

更新日期:2020-01-09
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