Mechanical, Vulcametric, and Thermal Properties of the Different 5-ethylidene 2-norbornene Content of Ethylene-Propylene-Diene-Monomer Vulcanized with Different Types and Compositions of Peroxides

2009-05-15
Cavdar, Seda
Ozdemir, Tonguc
Usanmaz, Ali
Ethylene-propylene-diene-monomer (EPDM) rubber is an important commercial polymer. The vulcanization process significantly changes its thermal, mechanical, and vulcametric properties. This study was carried out to find optimum formulation of EPDM composite for a better application in automotive industry. Sixteen EPDM polymer samples having different 5-ethylidene 2-norbornene (ENB) and ethylene contents were vulcanized with different types and compositions of pet-oxide and coagents. The mechanical and vulcametric properties of these samples were measured and compared. The type of peroxide, coagent, and EPDM grade affected the mechanical, thermal, and vulcametric properties of the EPDM rubber to some extend. Use of aromatic peroxide and coagent increased the thermal stability slightly. Mechanical properties were changed very slightly with the change of peroxide type for the same content of peroxide and coagent. Scorch time and cure time decreased with initial increase of the peroxide content. EPDM compound vulcanized with BBPIB peroxide and TAC/S coagent has higher cure time than EPDM compound vulcanized with DMBPHa peroxide and TMPTMA coagent. Coran method was used for the modeling of experimental data. Velocity constant for the formation of peroxide radical and polymer radical were found for each case. (C) 2009 Wiley Periodicals, Inc. Appl Polym Sci 112:1891-1896, 2009
JOURNAL OF APPLIED POLYMER SCIENCE

Suggestions

Mechanical properties of soft liner-poly(methyl methacrylate)-based denture material
Usanmaz, Ali; Latifoglu, MA; Dogan, A; Akkas, N; Yetmez, M (Wiley, 2002-07-18)
In this study, the mechanical properties of two different permanent soft lining materials and their bonding to poly(methyl methacrylate) (PMMA) were compared. Both of the soft liners were heat-cured commercial materials. The polymerization was carried out by conventional methods suggested by manufacturer, and the curing was done at the temperature of boiling water for 5, 15, 25, and 35 min. The sample groups were tested in the computer-aided tensile-testing machine at a rate of 2 mm/min. The slow rate helps...
Additives for ultraviolet-induced oxidative degradation of low-density polyethylene
Oluz, Zehra; Tincer, İsmail Teoman (Wiley, 2016-05-05)
Polyethylene (PE) is one of the most widely produced and widely used plastics in the world. Saturated hydrocarbons cannot absorb the energy of the light reaching earth, so the degradation process is rather slow; this, in return, causes disposal problems. On the other hand, it was observed that in the presence of oxygen and impurities in the polymer matrix, the degradation could be reduced to shorter time intervals. In this study, vanadium(III) acetyl acetonate (VAc), serpentine (SE), and Cloisite 30B (CL) w...
Physical Properties and Cure Characteristics of Natural Rubber/Nanoclay Composites with Two Different Compatibilizers
Dogan, Mehmet; Oral, Demet Dengiz; Yilmaz, Betul; Savu, Melih; Karahan, Selcuk; Bayramlı, Erdal (Wiley, 2011-08-05)
The effects of epoxidized natural rubber (ENR) and maleic anhydride-grafted polybutadiene (PB-g-MA) as compatibilizers to rubber formulations with and without organo-modified layered silicates are investigated. The physical properties and curing characteristics of composites are studied by moving die rheometer, rubber process analyzer, tensile, tear, and hardness testing. The state of organoclay intercalation was determined by X-ray diffraction method. The addition of compatibilizers, especially ENR 50, res...
Viscoelastic characteristics of chain extended/branched and linear polyethylene terephthalate resins
Yılmazer, Ülkü; Xanthos, M; Bayram, Göknur; Tan, V (Wiley, 2000-03-01)
Two chemically modified chain extended/branched polyethylene terephthalate (PET) resins and one unmodified resin, considered to be linear, were characterized in terms of their melt flow, die swell, and viscoelastic properties. The three resins had reportedly similar nominal intrinsic viscosities but exhibited different viscoelastic behavior. The modified resins had lower melt flow index, higher die swell, higher complex viscosity and higher storage modulus than the unmodified one. The Cole-Cole plots of the...
Thermal characterization of glycidyl azide polymer (GAP) and GAP-based binders for composite propellants
Selim, K; Özkar, Saim; Yılmaz, Levent (Wiley, 2000-07-18)
Differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) were used to investigate the thermal behavior of glycidyl azide polymer (GAP) and GAP-based binders, which are of potential interest for the development of high-performance energetic propellants. The glass transition temperature (T-g) and decomposition temperature (T-d) of pure GAP were found to be -45 and 242 degrees C, respectively. The energy released during decomposition (Delta H-d) was measured as 485 cal/g. The effect of th...
Citation Formats
S. Cavdar, T. Ozdemir, and A. Usanmaz, “Mechanical, Vulcametric, and Thermal Properties of the Different 5-ethylidene 2-norbornene Content of Ethylene-Propylene-Diene-Monomer Vulcanized with Different Types and Compositions of Peroxides,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 1891–1896, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57968.