Effect of hyperbranched poly(citric polyethylene glycol) with different polyethylene glycol chain length on starch sizing and compatibility with blended yarns

Abstract

Blend of starch and water‐soluble polyester has been widely used in warp sizing because of its good film‐forming, biodegradability, and adhesion to polyester/cotton blended yarns (T/C). In this study, a series of hyperbranched polyesters poly(citric polyethylene glycol) (PCPEG) with varied chain length of polyethylene glycol (PEG) were prepared with citric acid and PEG at molar ratio of 1:3 and 150 °C for 3 h in vacuum and characterized by Fourier transformed infrared, gel permeation chromatography, and 1H nuclear magnetic resonance. PCPEG blended maize starch (PCPEG/MS) as sizing agent of T/C 80/20 and effects of PEG chain length of PCPEG on the property of the blending sizing agent were studied. Results indicated PCPEG could improve the compatibility between starch and T/C 80/20 and the optimum content of PCPEG as blended sizing agent was 8%. PCPEG not only decreased apparent viscosity of MS paste but also increased viscosity stability of the paste. In addition, with increase of PEG chain length of PCPEG, viscosity stability of PCPEG/MS paste increased, but the value of all adhesion performances of T/C 80/20 after sizing decreased. Long chain of PEG is not good for compatibility between PCPEG and starch. The starch blending PCPEG has potential applications in sizing blended yarns in textile industry. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48928.

Effect of hyperbranched poly(trimellitic glyceride)/oxidized starch composite sizing agent on the adhesion of polyester yarns

“…Sizing agents in warp sizing can not only improve the tensile strength and wear resistance of warp sizing, but also reduce yarn hairiness 1 . There are some necessary physical and chemical properties for sizing agents, such as appropriate viscosity, good miscibility, favorable film‐forming ability, adequate adhesion and easy desizing 2,3 . The appropriate viscosity and good miscibility for sizing agents can make it penetrate evenly into the yarn.…”

“…Easy desizing will not adversely affect fabric post‐treatment. There are three kinds of materials to meet the above standards of sizing agents, which are starch, polyvinyl alcohol, and polyacrylic acid 3 . Starch and its derivatives (oxidized starch, acid‐hydrolyzed starch and grafted starch) are a kind of sustainable sizing agent and suitable for sizing natural fibers 4 .…”

“…Starch and its derivatives (oxidized starch, acid‐hydrolyzed starch and grafted starch) are a kind of sustainable sizing agent and suitable for sizing natural fibers 4 . Polyvinyl alcohol and polyacrylic acid are appropriate for sizing synthetic fibers 3,5 …”

Preparation and characterization of compatibilized and toughened polylactic acid/cellulose acetate films by long‐chain hyperbranched polymers

“…Long‐chain hyperbranched polymers (LCHBPs) are formed by introducing linear long‐chain units into the original hyperbranched polymer structure, which contains both the long chain structure and the three‐dimensional spherical conformation 38 . The properties of LCHBPs can be the combination of the properties of linear polymers and hyperbranched polymers, which helps maintain topology and high reactivity, while having strong chain entanglement 39 . LCHBPs have higher viscoelasticity than hyperbranched polymers because entanglement can improve the melt strength, and has lower viscosity than linear polymers, 40 so it is suitable for material processing 41 and has greater development prospects.…”

“…38 The properties of LCHBPs can be the combination of the properties of linear polymers and hyperbranched polymers, which helps maintain topology and high reactivity, while having strong chain entanglement. 39 LCHBPs have higher viscoelasticity than hyperbranched polymers because entanglement can improve the melt strength, and has lower viscosity than linear polymers, 40 so it is suitable for material processing 41 and has greater development prospects. The long PLA molecular chains were bonded to the terminal groups of HBPs, and the grafted HBPs were used as compatibilizers and plasticizers of the PLA/cellulose nanocrystal blend to improve its compatibility and toughness.…”