Physical properties of polyester fibers degraded by aminolysis and by alkalin hydrolysis

Abstract

SynopsisPermeant degradation affects the brittleness, flexural fatigue, and .ultimate tensile properties of polyester fibers more drastically than topochemical degradation. Topochemical degradation was obtained by hydrolysis with aqueous NaOH and permeant degradation by aminolysis with aqueous ethylamine. Treatment with aqueous sodium hydroxide appears to leave the polyester fiber surfaces more resistant to abrasion damage.

Analysis of functionalized polyethylene terephthalate with immobilized NTPDase and cysteine

“…Therefore, in this study, cysteine was immobilized on aminolyzed and carboxylated PET to assess the effects of surface modification on polymer properties and to assess the stability of cysteine immobilization. Since polymer properties of hydrolyzed PET were assessed in this study and showed a loss of mechanical strength caused by hydrolysis, which is consistent with previous studies, cysteine immobilization on hydrolyzed PET was not studied [14,15,22,31].…”

“…Also, once the coated NTPDase is washed off, the polymer would lose the hemocompatibility. Studies done by Marconi et al [40] immobilized NTPDase to hydrolyzed PET, despite hydrolyzed PET showing loss of mechanical strength due to hydrolysis [14,15,22,31]. Based on these studies, immobilization of NTPDase to mechanically stable PET would potentially enhance hemocompatibility.…”

“…Hence, surface functionalization of PET would aid in immobilizing biomolecules which could potentially improve hemocompatibility. Currently, various different techniques, including hydrolysis [2,14,15], reduction [16], glycolysis [17], aminolysis [2,14,[18][19][20][21] and amination [1], are used to introduce reactive functional groups on PET surfaces.…”

Induced superabsorbency in polyester fiber

“…In addition, even in controlled state, the fiber surface is gradually degenerated with the development of the reaction. This condition results in generating holes, weakening the surface and consequently diameter and strength of the fibers reduction after hydrolysis reaction [2,6,7].…”

Studies on synthesis and characterization of N‐alkyl terephthalamides using different amines from polyethylene terephthalate waste

“…Collins et al 20 have analyzed the molecular weight distributions of aminolyzed PET using gel-permeation chromatography. Ellison et al 21 have reported the physical properties of PET fibers degraded by aminolysis, whereas Farrow et al 22 have studied the degradation of PET by methylamine through infrared and X-ray methods. Popoola 23 suggested the aminolytic degradation of PET and mechanism of the reaction.…”