Some sorption characteristics of poly(trimethylene terephthalate) with disperse dyes

Sánchez

Textile Research Journal

et al. 2007

The textile fiber made of poly(trimethylene terephthalate) came onto the market a few years ago. This fiber has certain advantages over traditional polyester, especially its greater elasticity and the fact that it can be dyed at lower temperatures. Here we study the dyeing kinetics of this “new” fiber using an azo disperse dye, C.I. Disperse Red 82, observing that the dyeing rate increases with temperature and that dyebath exhaustions only reach acceptable levels at temperatures above 80 °C. In order to quantify and compare the experimental data obtained, three kinetics models have been chosen. To fit results with models, non-linear regression methods have been applied and, to differentiate between early and final stages, two levels of exhaustion have been checked. From results obtained with the Chrastil model, apparent diffusion coefficients and the activation energy of diffusion have been calculated.

Section: Diffusion Coefficients and Activation Energy Of Diffusionsupporting

confidence: 90%

Kinetic and Diffusional Approach to the Dyeing Behavior of the Polyester PTT

Sánchez

Textile Research Journal

et al. 2007

J of Applied Polymer Sci

“…Poly(trimethylene terephthalate) (PTT) is a semicrystalline thermoplastic commercialized since 1998. The available literature on solvent sorption in this matrix is scarce because only the sorption of methylene chloride9 and some dyes10 has been examined.…”

Section: Introductionmentioning

confidence: 99%

Increasing the resistance of poly(ether imide) to solvents by blending with poly(trimethylene terephthalate)

Ramiro¹,

Eguiazábal²,

Nazábal³

2009

We studied the sorption behavior of poly (ether imide) (PEI) upon the addition of minor amounts (10 and 30%) of miscibilized poly(trimethylene terephthalate) (PTT) under acetone and other common solvent environments. Significant solvent sorption (maximum solvent sorption ¼ 8-12 wt %) and changes in mechanical properties were observed only in the case of acetone. The sorption of acetone was Fickian and partially irreversible. Both sorption and solubility decreased markedly upon PTT addition to PEI, most likely as a result of a blendinginduced decrease in the free volume. The decreases in the modulus were attributed to plasticization, and the mixed effects on the elongation at break were attributed to the combined effects of fast plasticization and slower swelling. The joint effects of applied stress and the presence of acetone were studied with creep tests. In these tests, a combination of a free volume increase, plasticization, and superficial cracking of PEI was proposed to occur.

J of Applied Polymer Sci

“…In studying the dyeing properties of the fabrics, we mainly measured the K / S value, namely, the ratio of the absorption coefficient ( K ) to the scattering coefficient ( S ), to determine the dye uptake of a specific dyeing, using the Kubelka–Munk one‐constant theory shown in eq. (4): 20 where R is the absolute spectral reflectance of the sample at infinite thickness. To calculate the K / S values of the dyed samples from eq.…”

Section: Methodsmentioning

confidence: 99%

Attaining optimal dyeability and tensile properties of polypropylene/poly(ethylene terephthalate) blends with a special cubic mixture experimental design

Mirjalili

Moradian

Ameri

2011

In this investigation, we attempted to enhance the dyeability of polypropylene (PP) with disperse dyestuffs without adversely affecting its tensile properties. To this end, a special cubic experimental design was used to predict the effect of variations in the properties of a tricomponent mixture composed of PP, poly(ethylene terephthalate) (PET), and maleic anhydride grafted polypropylene (PP-g-MA) on the dyeability and tensile properties of the resultant polymer blend. The results illustrate that there seemed to be critical PET content, above which the blend's dye uptake tended to remain constant, but the tensile properties were adversely affected. Further analysis of the results indicated that the PP/PET/PP-g-MA blends in which the PET and PP-g-MA contents were in the range 10-15 and 4-5 wt %, respectively, gave maximal dye uptake and desirable tensile properties.