Compatibility Studies on Elastomers and Polymers with Ethanol Blended Gasoline

Table 5

Plastics properties after immersion in fuels.

	Air-55	E5 WET	E5 DRY	E10 WET	E10 DRY
Weight change (%)
Nylon-66	−3.1±0.1	−3.0±0.1	-NA-	−1.0±0.02	-NA-
Delrin	−0.3±0.01	1.0±0.1	-NA-	1.5±0.1	-NA-
Volume change (%)
Nylon-66	−4.0±1.0	−3.9±1.4	-NA-	−1.1±0.1	-NA-
Delrin	−1.0±0.1	1.1±0.1	-NA-	2.0±0.03	-NA-
Tensile strength (Mpa)
Nylon-66	72±1	51±9	-NA-	34±13	-NA-
Delrin	63±1	53±3	-NA-	53±1	-NA-
Elongation (%)
Nylon-66	12±5	5±1	-NA-	6±3	-NA-
Delrin	8±4	10±3	-NA-	15±2	-NA-
Impact strength (J/m)
Nylon-66	45±4	35±5	-NA-	61±11	-NA-
Delrin	36±4	45±7	-NA-	46±11	-NA-
Flexural strength (Mpa)
Nylon-66	7±1	8±1	-NA-	5±0.5	-NA-
Delrin	7±0.2	6±0.3	-NA-	5±0.2	-NA-