𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Modification of aqueous polyurethane dispersions via tetraphenylethane iniferters

✍ Scribed by K. Tharanikkarasu; B. K. Kim

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
223 KB
Volume
73
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Aqueous polyurethane (PU) dispersions containing tetraphenylethane iniferter groups were prepared from 4,4Ј-diphenylmethane diisocyanate, poly(propylene oxide)glycols, dimethylol propionic acid, and 1,1,2,2-tetraphenylethane-1,2-diol. To improve the water resistance of the dispersions, methyl methacrylate monomers were added into these dispersions and block-copolymerized onto the main PU chain. The viscosity and particle size of the dispersions were determined. Dispersion-cast films were characterized in terms of the contact angle, the swell in water, and the mechanical properties. Contact-angle and water-swell measurements showed that the hydrophilicity of the films was decreased significantly when methyl methacrylate was polymerized in the presence of tetraphenylethane containing aqueous PU dispersions.

πŸ“œ SIMILAR VOLUMES

Modification of aqueous polyurethane dis
Modification of aqueous polyurethane dispersions by polybutadiene
✍ S. S. Yoon; S. C. Kim πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 226 KB πŸ‘ 1 views

## Abstract Aqueous polyurethane (PU) adhesives are nontoxic and nonflammable and do not pollute the air. However, they have low adhesive strengths compared to solvent‐based PU adhesives because of a low affinity with rubber substrates. In this study, PU adhesives were synthesized from isophorone d

β€˜Living’ Radical Polymerization of Styre
β€˜Living’ Radical Polymerization of Styrene Using Tetraphenylethane-based Polyurethane Iniferter
✍ Tharanikkarasu, Kannan; Radhakrishnan, Ganga πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 418 KB πŸ‘ 2 views

A novel polyurethane iniferter synthesized from 1,1,2,2-tetraphenyl-1,2ethane diol and toluene diisocyanate has been used to polymerize styrene through a "livingÏ radical mechanism. A rate equation (R p P [styrene]1Γ•1 [polyurethane iniferter]0Γ•93) and overall activation energy (E a \ 99 kJ mol~1) ha