Making of sound damping from interpenetrating polymer network of polyurethane and EPDM rubber with corncobs powder (Zea mays) as filler material

Interpenetrating polymer network (IPN) had shyntesized at using ethylene propylene diene monomer (EPDM) shyntetic rubber and polyurethane (PU) simultaneously then corncobs powder was added as filler to produce IPN composite. PU Prepolymer had synthesized by mixing diphenylmethane diisocyanate and po...

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Bibliographic Details
Main Authors: Siregar, Amir Hamzah, Tahri, Nur Rahmah
Format: Conference Proceeding
Language:English
Subjects:
Absorptivity
Damping
Density
Diphenyl methane diisocyanate
Filler materials
Fillers
Interpenetrating networks
Mechanical properties
Mechanical systems
Morphology
Particulate composites
Physical properties
Polymers
Polypropylene glycol
Polyurethane resins
Prepolymers
Propylene
Rubber
Sound
Sound transmission
Stearic acid
Strain
Tensile strength
Water absorption
Zinc oxide
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Summary:Interpenetrating polymer network (IPN) had shyntesized at using ethylene propylene diene monomer (EPDM) shyntetic rubber and polyurethane (PU) simultaneously then corncobs powder was added as filler to produce IPN composite. PU Prepolymer had synthesized by mixing diphenylmethane diisocyanate and polypropylene glycol with 2 :1 mol ratio of NCO and OH. EPDM rubber was vulcanized by addition of stearic acid, zinc oxide, MBTS and sulfur. PU Prepolymer and EPDM were vulcanized and pressed with a hot press at 140℃ to produce IPN EPDM-PU then characterized by tensile strength test, crosslink density test and FTIR test. The specimen of EPDM-PU optimum were added with corncobs powder with 50:50 ; 60:40 ; 70:30 ; 80:20 ; 90:10 variation and without the consisting of filler material resulting in composite IPN EPDM-PU-Corncobs powder. Furthermore EPDM-PU-Corncobs powder was characterized with sound absorption coefficient test, mechanical properties, physical properties and morphological analysis. The result showed that EPDM-PU-Corncobs powder composite with 50:50 composition had the highest sound absorption coefficient with 0.9246 value and the lowest absorption coefficient value is 0.2573 at 100:0 Based on the result of the optimum mechanical system examination from EPDM-PU : Corncobs powder at ratio of 80:20 shows the resulting stress of 4.91 MPa, strain by 32.04% and modulus elasticity produced by 16.11 MPa. The physical for EPDM-PU: Corncobs powder sample has the highest density is 0.9499 g/cm3, and water absorption of 13.43%. The result of morphological analysis with SEM show that the mixture has been well distributed.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0136057