Abstract
Thermal, mechanical, and gas barrier properties of aluminosilicate (AS) filled Polyamide 66 (PA66) composites were characterized and, by extension, an applicability of the composites to the automotive fuel canisters was investigated. AS with grain sizes of D50 = 5 and 15 μm was used by weight fractions of 10–60%, and it was revealed that multi-functional PA66 composites which are superior to PA66 in the properties can be produced. Thermal conductivity was increased by an increase of filler connectivitywhich was determined by weight fractions and aspect ratios of fillers. The effect of filler aspect ratios was dominant on mechanical strengths. However, modulus was not influenced by the aspect ratios but was determined solely by the weight fractions of fillers. Impact strength decreased with an increase of the weight fractions of AS due to the loss of intrinsic toughness of PA66. The gas barrier property of PA66 was improved by the additions of AS. The fuel canister fabricated with the PA66/AS composite having thermal conductivity of 1.0 W/mK exhibited improved efficiency of adsorption and desorption of gases by 3.4% by maintaining temperatures of internal activated carbons low and high, respectively, at the exothermic adsorption and endothermic desorption of gases.
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