Investigation of the relation between free volume and physico-mechanical performance in rigid polyurethane foam containing turkey feather fibers: Part 2
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SAGE PUBLICATIONS LTD
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Rigid polyurethane foams (RPUFs) were modified with 0-15 wt.% turkey feather fibers (TFFs) produced from waste turkey feathers. One-shut free rising method was used for the production of TFFs-filled-RPUFs in a closed mold. The dependence of mechanical performance and water vapor permeability (WVP) feature of the final foams on TFFs loading was evaluated with free volume change. The free volume analysis was performed via Positron Annihilation Lifetime Spectroscopy (PALS), while the mechanical and WVP characteristics were determined with the use of the universal tester machines. PALS findings showed that the incorporation of TFFs with RPUF matrix caused the considerable diminishment in the free volume due to TFFs serving as a filling material and formation of strong secondary bonds between components. Moreover, tensile strength and extension of the foams decreased with the increasing of TFFs, which caused by the occurrence of noteworthy restriction on the spatial alignment and orientation capability of polyurethane chains due to the lack of sufficient free volume allowing the chains to move freely. As for the compression tests, all the TFFsloaded RPUFs depicted substantially lower performance due to TFFs interfering with the ordered organization of isocyanate domains. Moreover, impact test results showed that the addition of TFFs into RPUF matrix brought about the insufficient impact energy delocalization throughout the matrix due to the restriction on the mobility of polymer chains. Additionally,the remarkable diminishment in WVP was recorded due to the reduction in the number of vacancies and constitution of keratin composed of roundly 60% of hydrophilic protein (especially cystine). All in all, this study established a strong links between free volume and characteristics of TFFs-loaded RPUFs.
Açıklama
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was totally supported by Bolu Abant Izzet Baysal University(BAIBU) Scientific Research Project Coordination Unit with the grant number of BAP2020.29.02.1474
Anahtar Kelimeler
Rigid Polyurethane Foam, Turkey Feather Fibers, Tensile Strength, Compression and Impact Tests, Water Vapor Permeability, Positron Annihilation Lifetime Spectroscopy
Kaynak
Journal of Cellular Plastics
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
58
Sayı
6
Künye
Soykan, U., Khaleel, M., Cetin, S., Yahsi, U., & Tav, C. (2022). Investigation of the relation between free volume and physico-mechanical performance in rigid polyurethane foam containing turkey feather fibers: Part 2. Journal of Cellular Plastics, 58(6), 893-915.
