Abstract
The third monomer is an important characteristic of EPDM rubber, as it directly influences the mechanical and thermal properties of the material. Peroxide vulcanization is often used as a curing system. Furthermore, it increases lifetime and offers dynamic mechanical properties and scorch time lower than sulfur systems. Here, we report the influence of dipentamethylene thiuram tetrasulfide and HVA-2 (N,N-m-phenylene bismaleimide) on peroxide vulcanization at different ENB content on EPDM rubber to reach an ideal condition for the reduction of vulcanization scorch time and improve the its mechanical properties. Tensile strength was highly affected by SDS formulation, increasing to 10 MPa for ENB1.8% and 15 MPa for ENB4.9% and ENB8.5%. Moreover, elongation at break increased from 398 to 650% for ENB1.8%, from 260 to 433% for ENB4.9% and from 290 to 408% for ENB8.5%. Compression set of SDS system was also increased when different ENB contents were compared for a conventional vulcanization system. Tear strength of ENB4.9% and 8.5% enhanced from 25 to around 32 N/mm with the scorch delay system. These results are important for the improvement of gaskets of plate heat exchanger production.
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References
Çakmak NK, Engin YE (2019) Synthesis and characterization of ethylene propylene diene monomer (EPDM) rubber mixture. Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi 8(2):1299–1306
Shabani A, Colin X, Marque G, Monchy-Leroy C (2014) Peroxide cross-linking of EPDMs having high fractions of ethylenic units. Rubber Chem Technol 87(4):679–702
Li C, Wang Y, Yuan Z, Ye L (2019) Construction of sacrificial bonds and hybrid networks in EPDM rubber towards mechanical performance enhancement. Appl Surf Sci 484:616–627
Van Duin M (2001) Mechanical and elastic properties of sulfur vulcanized EPDM as a function of third monomer content. Rubber Chem Technol 74(1):138–150
Dluzneski PR (2001) Peroxide vulcanization of elastomers. Rubber Chem Technol 74(3):451–492
Kruzelák J, Sýkora R, Hudec I (2017) Vulcanization of rubber compounds with peroxide curing systems. Rubber Chem Technol 90(1):60–88
Hoffman W, Hanser C (1989) Rubber technology handbook. Hanser Publisher, New York
Gamlin C, Dutta N, Roy-Choudhury N, Kehoe D, Matisons J (2001) Influence of ethylene–propylene ratio on the thermal degradation behaviour of EPDM elastomers. Thermoch Act 367:185–193
Coagent choice can boost compound properties. Rubber and plastics News
Grima MA, Eriksson JG, Talma AG, Datta RN, Noordermmer JW (2009) Mechanistic studies into the new concept of co-agents for scorch delay and property improvement in peroxide vulcanization. Rubber Chem Technol 82(4):442–460
Grima MA, Talma AG, Datta RN, Noordermeer JW (2006) New concept of co-agents for scorch delay and property improvement in peroxide vulcanization. Rubber Chem Technol 79(4):694–711
Das CK, Banerjee S (1974) Studies on dicumyl peroxide vulcanization of styrene—butadiene rubber in presence of sulfur and 2-mercaptobenzothiazole. Rubber Chem Technol 47(2):266–281
Grima MA, Eriksson JG, Talma AG, Datta RN, Noodermeer JWM (2007) Property improvement in peroxide vulcanization. KAUTSCHUK. Kauts Und Gummi Kunsts 60(5):235
Halimatuddahliana HI, Md Akil H (2005) The effects of dynamic vulcanization by dicumyl peroxide (DCP) and N, Nm-phenylene bismaleimide (HVA-2) on the properties of polypropylene (PP)/ethylene-propylene diene terpolymer (EPDM)/natural rubber (NR) blends. Polym Plast Technol Engine 44(7):1217–1234
Halimatuddahliana HI, Akil HMd (2005) The effect of HVA-2 addition on the properties of PP–EPDM–NR ternary blends. J Elast Plast 37(1):55–72
Fujio R, Kitayama M, Kataoka N, Anzai S (1979) Effects of sulfur on the peroxide cure of EPDM and divinylbenzene compounds. Rubber Chem Technol 52(1):74–83
Zhao J, Ghebremeskel G, Peasely JA, Neches P (2001) Properties of EPDM/SBR blends cured with peroxide and sulfur coagent. Kauts Und Gummi Kunsts 54(5):223–229
Wang H, Ding Y, Zhao S, Wrana C (2015) Peroxide cross-linking of EPDM using moving die rheometer measurements. I: effects of the third monomer concentration and peroxide content. Rubber Chem Technol 88(1):40–52
Ozdemir T (2008) Gamma irradiation degradation/modification of 5-ethylidene 2-norbornene (ENB)-based ethylene propylene diene rubber (EPDM) depending on ENB content of EPDM and type/content of peroxides used in vulcanization. Radiat Phys Chem 77(6):787–793
Imanfir M, Ostad Movahed S, Ahmadpour A (2018) Effects of peroxide and phenolic cure systems on characteristics of the filled ethylene–propylene–diene monomer rubber (EPDM). J Appl Polym Sci 135(21):46213
Choi SS, Kim YK (2011) Analysis of 5-ethylidene-2-norbornene in ethylene-propylene-diene terpolymer using pyrolysis-GC/MS. Polym Test 30(5):509–514
Flory PJ, Rehner J Jr (1943) Statistical mechanics of cross-linked polymer networks I. Rubberlike elasticity. J Chem Phys 11:521
Keller RC (1988) Peroxide curing of ethylene-propylene elastomers. Rubber Chem Technol 61(2):238–254
Wang H, Zhuang T, Shi X, Van Duin M, Zhao S (2018) Peroxide cross-linking of EPDM using moving die rheometer measurements. II: effects of the process oils. Rubber Chem Technol 91(3):561–576
Murakami MS, Diniz MF, Silva LM, Sanches NB, Dutra RDCL (2019) Off-line TLC-IR (UATR) characterization of additives in EPDM rubber. Polym Test 79:106042
Loan LD (1964) Peroxide crosslinking of ethylene–propylene rubber. J Polym Sci Part A Gener Pap 2(7):3053–3066
Tao Z, Virivabanthorn N, Ghumman B, Barry C, Mead J (2005) Heat resistant elastomers. Rubber Chem Technol 78(3):489–515
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Sartori, C.M.L., Hiranobe, C.T., dos Santos, R.J. et al. Effect of sulfur donor and co-agent as scorch delay system over third monomer EPDM-ENB content. J Rubber Res 24, 339–346 (2021). https://doi.org/10.1007/s42464-021-00099-3
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DOI: https://doi.org/10.1007/s42464-021-00099-3