Hyperbranched Polyether and Polyether-Urethane Composites with Interpenetrating Networks

Abstract

In order to improve mechanical properties of polyurethane, hyperbranched interpenetrating network(H-IPN) was achieved by incorporating hyperbranched polyethrs into polyether-Urethane that derived from hydroxyl terminated ethylene oxide tetrahydrofuran copolyether (PET) and isophorone diisocyanate (IPDI). It was found that H-IPN exhibited dual-phase morphology, and hydrogen bonding was formed between hyperbranch polyether and polyether-Urethane. H-IPN shows synergetic effect, the tensile strength of H-IPN increased from 1.39MPa of neat polyether-Urethane to 2.67 MPa; Meanwhile, the elongation increased from 605% of control sample to 2304%.

Preparation and characterization of cationic silicone-acrylic latex surface sizing agent

“…Waterborne polyurethane/poly (n-butyl acrylate-styrene) hybrid emulsions were also used as surface sizing agents, and the Cobb values at 30 and 60 s were only 10.23 and 11.89% of the original paper, respectively [13]. The mechanical properties of the PU sizing agents were remarkably improved by incorporating hyper branched polyether or isophorone diisocyanate [4,8]. Apparently, interest in the cationic SAE surface sizing agent has increased in recent years and the majority of the studies focused on enhancing the water resistance and mechanical properties of paper.…”

“…Many types of surface sizing agents such as wax, alkyl ketene dimer (AKD), poly (styrene-acrylic acid) (SAA), styrene-acrylate emulsion (SAE), poly (styrene-maleic anhydride) (SMA), polyurethane (PU), etc., were used to improve the properties of paper [1][2][3][4][5][6][7][8][9][10][11][12]. Therefore, more and more attention has been paid to the synthesis of surface sizing agents with superior characteristics.…”