A breathable waterborne poly-(urethane/urea) coating containing PO-EO-PO triblock copolymer. (7th October 2020)

• Record Type: Journal Article
• Authors: Chen, Shu-Yi; Chen, Chin-Wen; Cheng, Ling-Chen; Chuang, Fu-Sheng; Rwei, Syang-Peng
• Is Part Of: Materials research express. Volume 7:Number 10(2020)
• Publication Date: 2020-10-07
• Subjects: waterborne polyurethane -- textile coating -- breathable coating -- water vapor permeability -- water pressure resistance; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/abba50
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: A breathable waterborne poly-(urethane/urea) (WPU) coating for textiles was synthesized by a pre-polymer method with 4, 4′-Diisocyanate dicyclohexylmethane (H12 MDI), Poly(propylene oxide)- b -poly(ethylene oxide)- b -poly(propylene oxide) triblock diols (PO-EO-PO diols), and Polyteramethylene glycol (PTMG). The PO-EO-PO diols were incorporated into the WPU to improve the swelling issue of frequently observed in the polyethylene glycol (PEO) segments. The stability, mechanical property, thermal properties, and breathability of PO-EO-PO, including WPUs were investigated by varying PTMG/PO-EO-PO diol ratios. The PO-EO-PO incorporated WPUs showed excellent mechanical properties: 250% of tensile elongation and breaking stress of 15–27 MPa. The breathability reached 620–15 000 mm of water pressure resistance H2 O and 2717–63 822 g H2 O 24 h m −2 of vapor permeability. The highly breathable, WPU coating contained with different PO/EO fraction of PO-EO-PO diols will play an essential role in the garment-textile industry to convert to a greener process.