Improvement of mechanical properties of ramie/poly (lactic acid) (PLA) laminated composites using a cyclic load pre-treatment method

Autor:	Nanting Zhou, Bin Yu, Liang Yinzheng, Yiping Qiu, Mingqi Ye, Zhongde Shan, Lan Yao
Rok vydání:	2013
Předmět:	Materials science Flexural modulus technology industry and agriculture Modulus Compression molding Ramie Lactic acid Crystallinity chemistry.chemical_compound chemistry Flexural strength Ultimate tensile strength Composite material Agronomy and Crop Science
Zdroj:	Industrial Crops and Products. 45:94-99
ISSN:	0926-6690
DOI:	10.1016/j.indcrop.2012.12.014
Popis:	Ramie/poly (lactic acid) (PLA) laminated composites were fabricated by the compression molding. To improve the mechanical properties of this type of composites, a cyclic load pre-treatment was performed. Ramie plain woven fabrics as the reinforcing material were pre-treated under wet state by cyclic tensile loading several times. The results showed that the fabrics treated by 70% level of the mean fracture load of the untreated ones with 10 cycles had the largest improvement of 38% in tensile strength. As to the mechanical properties of ramie/PLA laminated composites, the treated fabric reinforced composites had 35% higher tensile strength, 32% higher Young's modulus, 20% higher flexural strength and 17% higher flexural modulus than the untreated ones. The X-ray diffraction diagrams indicated that there was no distinct difference in crystallinity and crystalline orientation. The improvement of fabric mechanical properties is likely resulted from the increased orientation of molecules in the fibers and that of the fibers in the yarns.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e34681c2e7f7472bf3211804699a64d https://doi.org/10.1016/j.indcrop.2012.12.014 Zobrazit plný text záznamu Full Text from ScienceDirect