Formation and Investigation of Mechanical, Thermal, Optical and Wetting Properties of Melt-Spun Multifilament Poly(lactic acid) Yarns with Added Rosins

Abstract

One method for adding enhancing properties to textile materials is the insertion of natural ingredients into the textile products during the manufacturing or finishing process. The aim of this research is to investigate the formation of biodegradable melt-spun multifilament Poly(lactic acid) (PLA) yarns with different contents (i.e., 5%, 10%, and 15%) of natural material–rosin, also known as colophony. In this study, multifilament yarns were successfully formed from PLA and a natural substance–pine rosin by melt-spinning them at two different draw ratios (i.e., 1.75 and 2.75). The results indicated that a 1.75 draw ratio caused the formation of PLA and PLA/rosin yarns that were brittle. The presence of rosin (i.e., 5% and 10%) in multifilament yarns decreased the mechanical properties of the PLA/rosin melt-spun multifilament yarns’ tenacity (cN/tex), breaking tenacity (cN/tex), and tensile strain (%) and elongation at break (%) and increased absorbance in the entire UV region spectra. In addition, the melting point and degree of crystallinity decreased and there was an increase in the wetting angle compared with pure PLA multifilament. The investigation of melt-spun yarns with Raman spectroscopy proved the presence of rosin in PLA melt-spun yarns.

Amber extract as a bio‐additive to poly(lactic acid) films: Multimethod analysis of crystallinity and stability

“…The increase in cold crystallization enthalpies has been attributed to natural compounds (e.g., terpenes) which access pieces of the polymer chain and slow down the free zones of migration to the nucleus surface. 26 When analyzing the shape of the entire curve we notice a greater variation in the amount of energy involved in the samples with amber (baseline shift).…”

Experimental Investigation of the Tensile Behavior of Selected Tire Cords Using Novel Testing Equipment

“…The stress-strain and modulus-strain curves achieved in tensile tests of poly(ethylene terephthalate) and polyamide industrial yarns were presented by Jing and Shanyuan [25] with no description of method of fixing the yarn in the testing machine. The PVA (poly(vinyl acetate)) braided cords mechanical behavior using gripping systems (Figure 1c) was tested by Freire et al [26] and Poly (lactic acid) Yarns with Added Rosins-using laboratory spinning equipment COLLIN ® CMF 100-by Bolskis et al [27]-Figure 1d.…”

“…They recorded the position of two appropriate markers installed in the measuring part of the cord. trospinning tension of polyamide 66 yarns [24], (c) gripping systems used for monotonic qu tensile tests [26], (d) laboratory spinning equipment COLLIN ® CMF 100 [27] and (e) cord s fixed using epoxy resin molding.…”

“…The stress-strain curves of four distinguish cords were evaluated and com The results of elongation were measured in two ways: using testing machine he placement sensor and videoextensometer. [23], (b) electrospinning tension of polyamide 66 yarns [24], (c) gripping systems used for monotonic quasi-static tensile tests [26], (d) laboratory spinning equipment COLLIN ® CMF 100 [27] and (e) cord specimen fixed using epoxy resin molding.…”

“…Figure 1. Experimental set-ups: (a) for a dynamic test of HMPE at high temperature[23], (b) electrospinning tension of polyamide 66 yarns[24], (c) gripping systems used for monotonic quasi-static tensile tests[26], (d) laboratory spinning equipment COLLIN ® CMF 100[27] and (e) cord specimen fixed using epoxy resin molding.…”