ASTM D CHEMICAL RESISTANCE. These practices cover the evaluation of all plastic materials including cast, hot-molded, cold-molded, laminated. Buy ASTM D PRACTICES FOR EVALUATING THE RESISTANCE OF PLASTICS TO CHEMICAL REAGENTS from SAI Global. ASTM D , Standard Practices for Evaluating the Resistance of Plastics to ASTM D , Standard Test Method for Abrasion Resistance of Organic.
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Sunday, March 15, astm d At the completion of the seven-day exposure period each coupon was visually evaluated and mechanically tested in accordance with ASTM D to determine if the stressed chemically exposed laminates mechanical c543 changed. Test results were compared with the water control of the immersed tests. All test laminate coupons measured approximately mm in length by 25 mm in width and 5 mm in depth. While measuring the laminate coupons it was noted that the specimen edges were at a slight angle with respect to the depth of the material.
This slight angle resulted in laminate coupons being moderately wider on one face top compared to bottom.
This slight angle is a characteristic of the JetCut process. A total of 30 laminate coupons were tested: The strain fixtures and laminate coupons were placed in Plastic containers filled with chemical reagent. Chemical reagent levels in the containers were maintained so that the coupons were fully submerged over the seven-day soaking period. The device uses a three point bending design with coupon contact dimensions similar to those used in the D test.
Prior to ASTM D testing specimen coupons were tested in the device using a strain gauge bonded to the bottom of the specimen coupon. It was found that two and half rotations produced the desired strain and that the strain level remained constant over a seven-day period. Based on Figure 5.
All chemical reagents appear to decrease the laminates flexural yield stress and yield strain. Visual examination of a non-tested coupons cut from Plate 12 revealed that the coupon had an inherent plane asfm weakness in the middle of the test coupon Figure 5.
This coupon was discarded and was not used in the study. Further testing is required to verify that BOD greater asrm PPM significantly reduces the laminate flexural yield stress and flexural modulus. It should also be noted that two of the coupons 1 lb and c show much higher stress-strain response than a.
Chemical Compatibility ASTM D
Possible reasons for the lower response of coupon a are the influence of BOD or a flaw in the test coupon cut from Plate Further testing is required to confirm the influence of BOD reduction on the coupon flexible yield stress. Unlike the BOD test coupons three-test coupon show relatively consistent stress-strain response.
Possible reasons for the lower response are influence of 0. Further testing is required to confirm whether 0. zstm
Chemical Compatibility ASTM D543
ASTM D test for evaluating the resistance of laminate product in various chemical reagents were performed at the University of Waterloo. Weight and Dimensions Changes, test results indicate that the laminate product had no significant visible appearance changes after exposure to the chemicals reagent and that weight and depth changes are greater than width and length changes.
All weight and dimension changes were less than 0. Five percent Ammonium Hydroxide showed the greatest change 3.
The depth of BOD test coupons was significantly greater than the other chemical test coupons. The influence of coupon thickness on the flexural yield stress is not known at this time.
ASTM D – 14 Standard Practices for Evaluating the Resistance of Plastics to Chemical Reagents
BOD coupons were taken from Plates 12 and Variations in test coupon depth indicate that these test plates had greater variation in depth across the plate than the ast test plates. The low flexural yield stress results from Plates 11 and 12 could be due to the greater test specimen depth or inherent flaws in the test coupons Figure 5. Variations in the stress-strain response of coupons after immersion in 0. Further testing is required to determine if 0.
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