Selective cross-linking of carboxylated acrylonitrile butadiene rubber and study of their technological compatibility with poly(ethylene-co-methyl acrlylate) by means of mechanical, thermal, and chemical analysis
- 119 Downloads
Technologically compatible blend becomes an interesting arena of polymer blend industry for their significant properties and fascinating morphologies. This work encompasses the fabrication of technologically compatible blend through melt blending of poly(ethylene-co-methyl acrylate) (EMA) and carboxylated acrylonitrile butadiene rubber (XNBR) in five different ratios to study their compatibility by employing various techniques, like Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and dynamic mechanical thermal analysis (DMTA). To observe the reinforcing effect of blend specific amount of metal oxide, zinc oxide (ZnO) was incorporated into the system. Curing characterization, FTIR, and morphological analysis confirm that ZnO selectively forms cross-link with XNBR through the coordination complex and does not show any substantial effect on EMA. DMTA reveals high-temperature relaxation of the carboxylic salt of XNBR phase which reinforces the EMA/XNBRZnO-cross-linked blends and also verified by FTIR analysis. Although DSC shows single glass transition temperature (Tg) for all blend systems in between the Tg of pure polymer component, DMTA confirms the presence of two different Tg for plastic and rubber phases with close proximity, specifying technological compatibility in blend compounds. Increasing XNBR improves tensile strength of blends by sacrificing elongation at break. Therefore, our aim is to tune and optimize the blend features by judicial mixing of EMA and XNBR to mitigate the blend failure during service tenure and develop a novel technologically compatible blend.
KeywordsTechnological compatibility Ionic cross-link Carboxylated acrylonitrile butadiene rubber (XNBR) Poly(ethylene-co-methyl acrylate) (EMA)
This work was funded by the Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Ministry of Science and Technology, Govt. of India (ECR/2016/000048).
- 7.Varghese H, Bhagawan S, Thomas S (1999) Effects of blend ratio, crosslinking systems and fillers on the morphology, curing behavior, mechanical properties, and failure mode of acrylonitrile butadiene rubber and poly (ethylene-co–vinyl acetate) blends. J Appl Polym Sci 71:2335–2364CrossRefGoogle Scholar
- 16.Byun HS, Hasch B, McHugh M, Mähling FO, Busch M, Buback M (1996) Poly (ethylene-co-butyl acrylate). Phase behavior in ethylene compared to the poly (ethylene-co-methyl acrylate)-Ethylene system and aspects of copolymerization kinetics at high pressures. Macromolecules 29:1625–1632CrossRefGoogle Scholar
- 19.Allen MA, Fetcko JT (1997) Method of continuously formulating and applying a hot melt adhesive, Google PatentsGoogle Scholar
- 20.Santra RN, Chaki TK, Roy S, Nando GB (1993) Studies on miscibility of blends of thermoplastic polyurethane and poly (ethylene-co-methyl acrylate). Macromol Mater Eng 213:7–13Google Scholar
- 23.Bhawal P, Ganguly S, Das TK, Mondal S, Choudhury S, Das NC (2018) Superior electromagnetic interference shielding effectiveness and electro-mechanical properties of EMA-IRGO nanocomposites through the in situ reduction of GO from melt blended EMA-GO composites. Compos B 134:46–60CrossRefGoogle Scholar
- 32.Mandal U, Tripathy D, De S (1995) Effect of carbon black fillers on dynamic mechanical properties of ionic elastomer based on carboxylated nitrile rubber. Plast Rubber Compos Process Appl 1:19–25Google Scholar