MAH-g-EPDM

Figure 15.14 (a) The permittivity (s ) versus the frequency (log f) for EPDM containing different concentrations of EPDM-g-MAH as compatibilizer (b) dielectric loss (e") versus the frequency (log/) for EPDM containing different concentrations of EPDM-g-MAH as compatibilizer. (Prom Reference 66 with permission from Sage publications Etd.)... 

EPDM-g-MAH A graft copolymerization of EPDM with maleic anhydride... 

For the FTIR spectra of compatibilized EPDM/HNT nanocomposite with 5 phr of HNT loading, the absorption bands of Si-O stretching and Al-OH are shifted to 1027 and 932 cm respectively, both related to the formation of hydrogen bonds between outer and inner surfaces of the HNTs with EPDM-g-MAH, then suggesting the possibility of interaction of grafted polar functionalities with polar groups of the inner octahedral sheet. 

LDPE/EPDM and HOPE/ EPDM modified with LDPE-g-MAH reinforced with jute fibers Thermal properties Influence of compatibilizer on the thermal and mechanical properties of the bltaids was studied Sarkhel and Choudhury 2008... 

ABS content Sample (wt%) ABS-g- MAH content (wt%) EPDM- MAH content (wt%) g- Carbon black (wt%) Tensile Impact strength strength (MPa) (kJ/m ) Tensile Impact strength strength (MPa) (kJ/m ) ... 

Figure 15.7a shows that the two phases are with irregular domain sizes and shapes. This indicates that the NR/EPDM blends were completely immiscible, large EPDM domains being dispersed in the NR matrix. The average domain size of the dispersed phase was 4.1 pm. The compatibility of the NR/EPDM system was improved by the addition of a compatibilizer, as can be seen in Fig. 15.7b-g the treatment resulted in noticeable surface hardening, and the physical changes in the surface were expected to influence physically both the deformation and adhesion of the two mbbers, that is, the compatibilizers improved both the morphology and compatibility of the blends because of the reduction in the interfacial tension between EPDM and NR rubbers. The size of the dispersed phase (EPDM) domain decreased with the addition of compatibilizers, and no gross phase separation was present in the blends (Fig. 15.7). For NR/BR/EPDM, the domain size was approximately 3.8-1.26 pm NR/PVC/EPDM, 2.7-0.75 pm NR/chlorosulfonated PE/EPDM, 2-0.75 pm NR/p-radiation/EPDM 4-1.5 pm and NR/MAH/EPDM. 1-0.25 pm. These results are in agreement with the observations of Anastasiadas and Koberstein (58) and Meier (59), who reported that compatibilizers reduced the phase domain size.

Figure 15.7 SEM micrographs (a) 50/50 NR/EPDM without a compatibilizer, (b) NR/BR/EPDM, (c) NR/PVC/EPDM, (d) NR/chlorinated rubber/EPDM, (e) NR/chlorosulfanted PE/EPDM, (f) NR/y-radiation/EPDM, and (g) NR/MAH/EPDM. (From Reference 57 with permission from John Wiley Sons.)...

Pasbakhsh, R, Ismail, FI., Ahmad Fauzi, M. N., and Abu Bakar, A. 2009. Influence of maleic anhydride grafted ethylene propylene diene monomer (MAH-g-EPDM) on the properties of EPDM nanocomposites reinforced by halloysite nanotubes. Polymer Testing 28 548-559. 

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