Effect of modified phenolic resin on crosslinked network and performances of polyvinyl acetate blending emulsion

Abstract

The water‐soluble phenolic resin (PF) and the poly(vinyl alcohol) (PVA) modified phenolic resin (PPF) were synthesized by alkali catalysis method. Both were used as curing agents to blend with the polyvinyl acetate (PVAc) emulsion. The obtained PF, PPF and blending emulsion were characterized by FT‐IR, DSC, DLS, TEM, and viscosity analysis. The thermal stability of latex films was enhanced after blending. When the PF and PPF content was up to 15 wt %, the peel strength of the blending emulsion increased from 17.89 N/25 mm to 21.32 N/25 mm and 23.37 N/25 mm and the shear impact strength were 1.4 and 1.6 times that of unmodified emulsion adhesive, respectively. Moreover, the modification effect of PPF was better than PF due to its tough crosslinked network. Finally, layer cohesion played an increasingly important role in bonding forces with the increment of the PPF content by the glue residue analysis. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46448.

Symmetrical “Sandwich” Polybutadiene Film with High-Frequency Low Dielectric Constants, Ultralow Dielectric Loss, and High Adhesive Strength

“…In Figure a, the peel strength increased with increasing SEBS content and increasing 1,2-polybutadiene molecular weight. The adhesion force of the adhesive was dependent on the bulk strength of the adhesive layer, the interfacial interaction forces (van der Waals forces, hydrogen bonds, and electrostatic forces), deformability, and the fluidity of adhesive (mechanical coupling force). , Correspondingly, Figure shows the effect of molecular weight on the fracture interface and the failure mechanism using digital photographs, scanning electron microscopy images, and a schematic diagram of the damage mechanisms.…”

Tailoring Properties of Resol Resin-Derived Spherical Carbons for Adsorption of Phenol from Aqueous Solution

“…Their individual shape was practically perfectly spherical, and they were not observed to stick together into larger structures. The surprisingly favorable stabilizing effect obtained with PVA can be explained by a dehydration polycondensation reaction between a large amount of hydroxyl groups in the stabilizer and hydroxymethyl groups in the resol resin [ 33 ].…”

Investigation of Polyvinyl Alcohol–Phenolic Aldehyde–Polyacrylamide Gel for the Application in Saline Oil Reservoirs for Profile Modification

“…61 The absorption peaks of PVA-g-PAM-PF (SW) gel and PAM-g-PF (SW) gel were basically the same, but they were significantly enhanced at 3379 and 2938 cm −1 , indicating that PVA was successfully grafted. 62 The absorption band at 1215 cm −1 is caused by SO 3 − in PAM, 63 confirming that PAM contains sulfonic acid groups, and its intermolecular forces further improve the mutual solubility of the gelant solution, as well as the temperature and salt resistance after gelation.…”