Document omGZaqxQJZj2g2ez500DJeLQE

Hie lire Alta*) * 51mcb> 4-4t:s a <a September 2nd, 1987 Mr. Dick Znidarsic Technical Director Chardon Rubber Subject: Low Temperature Testing of Chardon Rubber Compounds Dear Dick; Samples supplied by Chardon Rubber were tested to determine their low temperature properties. Compound BX58J-26301 was reported to be a PVC compound containing no NBR rubber. Compound BX58J-26302 was reported to be the same compound with NBR rubber added. The Gehman low temperature test run showed the all PVC control compound to have better low tem perature properties by a slight margin. The low temperature brittleness test showed the NBR bearing compound to perform the best of the two compounds. Dick, we believe the compression/deflection test to come closest to reproducing the type of results you reported from Nissan. The hardness of the compound containing NBR was lower initially, but became harder than its counterpart at lower temperatures. The compression/deflection test reports the load necessary to deflect a sample a predetermined per centage. For your purposes we ran the test at room temper ature, -25 deg. C, -35 deg. C, and at -40 deg. C. Examination of the test results indicate that this data re flects the findings you described in our last meeting. The nitrile bearing compound does require higher loads to com press it the same amount than the non-nitrile bearing com pound. At room temperature there is no noticeable difference between the two recipes. At -25 deg. C, the two recipes are still relatively close in low temperature prop erties. However, at -35 deg. C, the NBR containing compound stiffens up considerably more than the non-NBR bearing com pound. The NBR/PVC compound appears to be approximately twice as stiff as the PVC control at -35 and -45 deg. C. CHARDO 01800 As a result of the data reported in this correspondence, we have initiated a program to study the effects of employing lower ACN polymers in PVC/NBR. alloys on compression/deflection test results. We will report our findings to you at a later date. Please let us know if we can be of any further help in your development effort. Sincerely, (\VJUJ "Srv&JJb BCC: J R Purdon D E Miller J R Frazier K M Kline J M Campo L A Cobb Michael Stockdale Customer Technical Service Goodyear Chemical Division CHARDO 01801 CHARDON RUBBER LOW TEMPERATURE TESTING BX58J 26301 26302 GERMAN LOW TEMP. T{ 2) T ( 5} T< 10) T(100) TORSION (DEG . C) -14. -9. -26. -21. -31. -26. -43. -38. BRITTLE TEMP. (C) -43.5 -49.5 COMPRESSION/DEFLECTION INITIAL TEST - FIRST CYCLE PSI g 10% 99. 50. PSI @ 20% 115. 125. PSI 8 30% PSI g 40% 247. 460. 235. 413. HARDNESS A 55. 52. COMPRESSION/MODULUS FINAL TEST THIRD CYCLE PSI g 10% 89. 50. PSI g 20% 97. 110. PSI g 30% 190. 226. PSI g 40% 495 . 436. INCHES SET .011 .012 COMPRESSION/MODULUS PSI g 10% PSI @ 20% PSI g 30% PSI g 40% HARDNESS A TESTED 8 140. 450. 1000. 2140. 83. --25C, INITIAL TEST 200. 550. 1120. 1850. 84. (FIRST CYCLE) COMPRES SION/MODULUS TESTED 8 --25C, FINAL TEST 3RD CYCLE PSI @ 10% 225. 360. PSI 8 20% 650. 950. PSI g 30% 1675. 2080. PSI @ 40% 3650 . 3350. INCHES SET .061 .061 COMPRESSION/MODULUS TESTED 8 --35C, INITIAL TEST PSI @ 10% 140. 325 . PSI g 20% 450. 740. PSI @ 30% 820. 1340. PSI g 40% 1355. 2005. HARDNESS A 86. 89. (FIRST RUN) COMPRESSION/MODULUS TESTED 8 -35C, THIRD CYCLE FINAL TEST PSI 8 10% 130 - 380. PSI 8 20% 355. 935. PSI @ 30% 1120. 2000. PSI 8 40% 1892. 3125. INCHES SET .025 .053 CHARDO 01802 CHARDON RUBBER LOW TEMPERATURE TESTING BX58J 26301 26302 COMPRESSION/MODULUS TESTED g PSI 0 10% 385. PSI @ 20% 950. PSI 6 30% 1750. PSI 40% 3200. HARDNESS A 91. -40C, INITIAL TEST 1460. 26S0. 3940. 5520. 93. (FIRST RUN) COMPRESSION/MODULUS PSI @ 10% PSI @ 20% PSI @ 30% PSI g 40% INCHES SET TESTED g 960. 2350. 4025. 6450. .105 -40C, FINAL 2000. 4100. 6550. 9100. .086 TEST THIRD CYCLE CHARDO 01803