WANG Haili, FAN Renxiang, FANG Huagao, et al. Effect of composition and structure of macromolecular polyurethane surfactant on structures and properties of waterborne polyurethane-acrylate latex[J]. CIESC Journal, 2016, (12): 5208-5214.
WANG Haili, FAN Renxiang, FANG Huagao, et al. Effect of composition and structure of macromolecular polyurethane surfactant on structures and properties of waterborne polyurethane-acrylate latex[J]. CIESC Journal, 2016, (12): 5208-5214.DOI: 10.11949/j.issn.0438-1157.20160794.
Macromolecular polyurethane surfactants(PUS) with equal degree of polymerization but different compositions and structures were designed and synthesized by reacting PCDL
PBA and PPG with isophorone diisocyanate(IPDI). Methyl methacrylate(MMA) monomer was polymerized in PUS micelles to prepare WPUA emulsions and dried latex films with different latex structure and morphology. Transmission electron microscopy(TEM)
Zeta nanosizer
and rotating viscometer were employed to characterize latex morphology
particle size
and shear viscosity of WPUA emulsions. ATR-FTIR
water absorption measurement
electromechanical universal testing machine
and UV-Vis spectroscopy were employed to characterize structures
water resistance
mechanical properties
and physical aging behaviors of WPUA films. PUS composition and structure had a significant influence on morphology and structure of WPUA latexes and properties of dried films. Distinct core-shell structure was achieved in WPUA latex using PCDL-based PUS as macromolecular surfactant. WPUA-PCDL film exhibited good mechanical and aging-resistant properties.