POLYURETHANES - EFFECT OF CHEMICAL-COMPOSITION ON MECHANICAL-PROPERTIES AND OXYGEN PERMEABILITY

ULUBAYRAM K., HASIRCI N.

POLYMER, cilt.33, sa.10, ss.2084-2088, 1992 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 10
  • Basım Tarihi: 1992
  • Doi Numarası: 10.1016/0032-3861(92)90874-v
  • Dergi Adı: POLYMER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2084-2088
  • Anahtar Kelimeler: POLYETHER POLYURETHANE, MECHANICAL PROPERTIES, OXYGEN PERMEABILITY, BIOMATERIAL
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A series of polyether urethane films with varying hard/soft segment ratio were synthesized using toluene-2,4-diisocyanate (TDI) and polypropylene glycol (PPG) in order to evaluate them as biomaterials. In order to obtain medical purity the polymerization reactions were carried out in bulk without using any other ingredients such as solvent, catalyst, u.v. absorber, etc. The effects of chemical composition and the presence of the chain extender on some properties were examined. For the samples with higher TDI to PPG ratio, a decrease in ultimate elongation and an increase in tensile strength were observed. Addition of chain extender caused an increase in both. On the other hand, the ultimate elongation increased and tensile strength decreased with an increase in molecular weight of the PPG used. As the chemical compositions are changed by increasing the polyol content, an increase in oxygen permeability is also observed.