Solvent‐induced modifications in polyester yarns. II. Structural and thermal behavior

Chidambaram, Dev; Venkatraj, R.; Manisankar, P.

doi:10.1002/app.12286

Cited by 14 publications

(10 citation statements)

References 34 publications

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“…Teli and Purkayastha studied the effects of solvent pretreatments on weight‐reduced fabrics 8. Solvent pretreatment is an important technique that induces extensive structural modification of the PET fibers 9. Chemical modification of the PET fibers by solvent pretreatment results in changes in weight loss, degree of crystallinity, shrinkage behavior and water absorption properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of pretreatment reagents on the hydrolysis and physical properties of PET fabrics

Kim¹,

Lee²,

Kim³

2009

J of Applied Polymer Sci

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The effects of pretreatment reagents on the hydrolysis and physical properties of PET fabrics were investigated under various alkaline hydrolysis treatment and pretreatment conditions. Before alkaline hydrolysis, solvent treatment with pretreatment reagents, including benzyl alcohol (PET-b) or 2-phenyl ethanol (PET-p), modified the structure of the PET fabric, thus affecting the hydrolysis and physical properties of the PET fabrics. Fabric weight loss increased with increasing hydrolysis time. The rate constant (k) increased markedly with increasing methyl groups in the pretreatment reagents. The activation energy (E a ) of untreated fabrics was higher than those of the treated fabrics. The crystallinity of the PET fabrics increased with increasing hydrolysis times (t) and methyl groups in the pretreatment reagents. The weight loss of PET-b increased with increasing pretreatment temperature (T). However, the weight loss of PET-p increased up to 100 C but decreased above 120C. The shrinkage of all samples increased with increasing hydrolysis times (t). Shrinkage of PET-b and PET-p was greater than that of untreated fabrics. PET-b displayed greater shrinkage than PET-p because byproducts polluted the PET fibers. Both the initial and maximum water absorption of the fabrics increased with increasing hydrolysis times (t).

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Section: Introductionmentioning

confidence: 99%

Effects of pretreatment reagents on the hydrolysis and physical properties of PET fabrics

Kim¹,

Lee²,

Kim³

2009

J of Applied Polymer Sci

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“…This could be ascribed to the solvent-introduced crystallization between fibers and swelling agents. It has been reproted that the interactions between fibers and swelling agents could result in the movements of fiber molecular chains under high-temperature and high-pressure conditions, and crystallinity of the fibers would occur as the temperature increased [21,22]. From Figure 4, however, it can be seen that there is no evident shift of the peaks on the WAXD patterns when PI fibers were treated with swelling agents.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Dyeability of Polyimide Fibers with the Assistance of Swelling Agents

Shao

Wang

et al. 2019

Materials

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Polyimide (PI) fibers have outstanding thermal stability and mechanical properties, but are difficult to dye with disperse and basic dyes. In this work, it was proposed to use N-methylformanilide (MFA), phenoxyisopropanol (PIP), and acetophenone (AP) as swelling agents to enhance the dyeability of PI fibers. The PI fibers treated with swelling agents were characterized by thermal gravimetric analysis, scanning electronic microscopy, tensile testing, and crystalline analysis. It was found that the swelling agents penetrated into the PI fibers in amounts greater than 10% (pertaining to the weight of PI fibers). The swelling agents did not really swell the PI fibers, but broke the interaction forces between the PI macromolecules. With the assistance of swelling agent, the PI fibers could be dyed with disperse and basic dyes in strong color strengths. AP exhibited the best performance for enhancing the dyeability of PI fibers, followed by MFA and PIP. The dyed PI fibers were found to have good colorfastness to washing.

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“…In each case, the starting temperature and peak melting temperature (Table 6) are noted. The final melting temperature corresponds to the melting of the most stable crystallite whereas the peak melting temperature is taken as the temperature at the maximum of melting endotherm [28]. The starting temperature is the starting of the melting endotherm and can be regarded as the melting of the smallest crystallite in the sample.…”

Section: Ftir Studiesmentioning

confidence: 99%

A New Approach to Dyeing of 80 : 20 Polyester/Cotton Blended Fabric Using Disperse and Reactive Dyes

Muralidharan

Laya

2011

ISRN Materials Science

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Polyester/Cotton blended fabrics are normally dyed by two-bath or one-bath two-step dyeing method. This paper deals with a new approach involving azeotropic ternary mixture of organic solvents pretreatment to dye polyester/cotton blends using disperse and reactive dyes in one-bath method. The effect of solvent pretreatments on dyeability, fastness, and few physicochemical properties has been investigated involving SEM, FTIR, DSC, and XRD studies, and results are presented.

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Solvent‐induced modifications in polyester yarns. II. Structural and thermal behavior

Cited by 14 publications

References 34 publications

Effects of pretreatment reagents on the hydrolysis and physical properties of PET fabrics

Effects of pretreatment reagents on the hydrolysis and physical properties of PET fabrics

Enhancing the Dyeability of Polyimide Fibers with the Assistance of Swelling Agents

A New Approach to Dyeing of 80 : 20 Polyester/Cotton Blended Fabric Using Disperse and Reactive Dyes

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