Development of Sound Insulation Material Using Flexible Epoxy with Elastic Properties and Recycled Polyurethane Foams

Hakkı Özer

Makale detayları

Development of Sound Insulation Material Using Flexible Epoxy with Elastic Properties and Recycled Polyurethane Foams

Yazarlar:

Hakkı Özer

Yayıncı:

Bursa Uludağ University

Ana Başlıklar:

Kompozit ve Hibrit Malzemeler | Otomotiv Mühendisliği (Diğer)

Dergi:

Uludağ Üniversitesi Mühendislik Fakültesi Dergisi Vol.30 Issue 1, pp.155-168

Belge Tipi:

Makale

Yayın Tarihi:

4/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344288

pISSN:

2148-4155

Anahtar kelimeler:

Özet:

 Improving acoustic ergonomics in electric vehicles increases sensitivity to environmental noise, leading to research beyond traditional sound insulation materials towards new alternatives. In this study, recycled polyurethane PU foam material was used to attenuate sound waves and reduce their wavelength. To prevent the transmission of sound waves through the foam material into other environments, flexible epoxy with elastic properties, ST37 steel, and Ethylene Propylene Diene Monomer EPDM sound barriers were developed. Sound absorption coefficients SAC and sound transmission losses STL were determined based on the thickness of the foam material used and the barrier materials. The tests were conducted using an impedance tube. The findings showed that the developed flexible epoxy sound barrier provided a more effective sound transmission loss. It was observed that increasing the thickness of the PU foam material alone did not provide sufficient sound insulation, but when used with flexible materials like EPDM or flexible epoxy barrier, superior sound insulation was achieved. Considering that the developed insulation materials also possess dielectric properties, it is recommended that these materials be evaluated as alternatives for both sound and electrical insulation.

 Improving acoustic ergonomics in electric vehicles increases sensitivity to environmental noise, leading to research beyond traditional sound insulation materials towards new alternatives. In this study, recycled polyurethane PU foam material was used to attenuate sound waves and reduce their wavelength. To prevent the transmission of sound waves through the foam material into other environments, flexible epoxy with elastic properties, ST37 steel, and Ethylene Propylene Diene Monomer EPDM sound barriers were developed. Sound absorption coefficients SAC and sound transmission losses STL were determined based on the thickness of the foam material used and the barrier materials. The tests were conducted using an impedance tube. The findings showed that the developed flexible epoxy sound barrier provided a more effective sound transmission loss. It was observed that increasing the thickness of the PU foam material alone did not provide sufficient sound insulation, but when used with flexible materials like EPDM or flexible epoxy barrier, superior sound insulation was achieved. Considering that the developed insulation materials also possess dielectric properties, it is recommended that these materials be evaluated as alternatives for both sound and electrical insulation.

 Improving acoustic ergonomics in electric vehicles increases sensitivity to environmental noise, leading to research beyond traditional sound insulation materials towards new alternatives. In this study, recycled polyurethane PU foam material was used to attenuate sound waves and reduce their wavelength. To prevent the transmission of sound waves through the foam material into other environments, flexible epoxy with elastic properties, ST37 steel, and Ethylene Propylene Diene Monomer EPDM sound barriers were developed. Sound absorption coefficients SAC and sound transmission losses STL were determined based on the thickness of the foam material used and the barrier materials. The tests were conducted using an impedance tube. The findings showed that the developed flexible epoxy sound barrier provided a more effective sound transmission loss. It was observed that increasing the thickness of the PU foam material alone did not provide sufficient sound insulation, but when used with flexible materials like EPDM or flexible epoxy barrier, superior sound insulation was achieved. Considering that the developed insulation materials also possess dielectric properties, it is recommended that these materials be evaluated as alternatives for both sound and electrical insulation.

 Elektrikli araçlarda ses ergonomisinin iyileştirilmesi, çevresel gürültülere karşı duyarlılığı artırdığı için, geleneksel ses izolasyon malzemelerinin ötesine geçilerek yeni malzemeler üzerine araştırmalar yapılmaktadır. Bu çalışmada, ses dalgalarını zayıflatarak dalga boyunu küçültmek amacıyla geri dönüştürülmüş poliüretan PU köpük malzeme kullanılmıştır. Ses dalgalarının köpük malzemeden diğer ortama geçişini engellemek için elastik özelliklere sahip esnek epoksi, ST37 çelik ve Etilen Propilen Dien Metilen EPDM ses bariyerleri geliştirilmiştir. Kullanılan köpük malzemenin kalınlığı ve bariyer malzemelerine bağlı olarak ses yutum katsayıları SAC ve ses iletim kayıpları STL belirlenmiştir. Testler, empedans tüpü kullanılarak gerçekleştirilmiştir. Elde edilen bulgular, geliştirilen esnek epoksi ses bariyerinin ses iletim kaybını daha etkin bir şekilde sağladığını göstermiştir. PU köpük malzemenin kalınlığı artırılsa bile tek başına yeterli ses yalıtımı sağlamadığı, ancak esnek özelliklere sahip EPDM veya esnek epoksi bariyer malzeme ile kullanıldığında üstün ses yalıtımı sağladığı tespit edilmiştir. Geliştirilen izolasyon malzemelerinin dielektrik özelliklere de sahip olması nedeniyle, bu malzemelerin hem ses hem de elektrik yalıtımı için alternatif malzemeler arasında değerlendirilmesi önerilmektedir.

Makale detayları

Development of Sound Insulation Material Using Flexible Epoxy with Elastic Properties and Recycled Polyurethane Foams

Yazarlar:

Hakkı Özer

Yayıncı:

Bursa Uludağ University

Ana Başlıklar:

Kompozit ve Hibrit Malzemeler | Otomotiv Mühendisliği (Diğer)

Dergi:

Uludağ Üniversitesi Mühendislik Fakültesi Dergisi Vol.30 Issue 1, pp.155-168

Belge Tipi:

Makale

Yayın Tarihi:

4/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344288

pISSN:

2148-4155

Sound Absorption Coefficient

Sound Transmission Loss

Sound Insulation

Flexible Epoxy

Polyurethane FoamSes Yutum Katsayısı

Ses İletim Kaybı

Ses İzolasyonu

Esnek Epoksi

Poliüretan Köpük

Sayı

Makale detayları

Yazarlar: Hakkı Özer

Yayıncı: Bursa Uludağ University

Ana Başlıklar: Kompozit ve Hibrit Malzemeler | Otomotiv Mühendisliği (Diğer)

Dergi: Uludağ Üniversitesi Mühendislik Fakültesi Dergisi Vol.30 Issue 1, pp.155-168

Belge Tipi: Makale

Yayın Tarihi: 4/2025

Belge Dili: Türkçe

Document ID (Org No.): 2001344288

pISSN: 2148-4155

Sayı

Yazarlar:

Hakkı Özer

Yayıncı:

Bursa Uludağ University

Ana Başlıklar:

Kompozit ve Hibrit Malzemeler | Otomotiv Mühendisliği (Diğer)

Dergi:

Uludağ Üniversitesi Mühendislik Fakültesi Dergisi Vol.30 Issue 1, pp.155-168

Belge Tipi:

Makale

Yayın Tarihi:

4/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344288

pISSN:

2148-4155