Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2006-12-01

Journal: SURFACE REVIEW AND LETTERS

Included Journals: Scopus、EI、SCIE

Volume: 13

Issue: 6

Page Number: 733-736

ISSN: 0218-625X

Key Words: poly (phthalazinone ether nitrile ketone)s; hydrophilic modification; heat resistance; water-borne coatings

Abstract: Poly(phthalazinone ether nitrile ketone)s (PPENK) was modified with NaOH in N,N-dimethyl acetamide (DMAc) in order to find a hydrophilic resin applied in heat-resist ant water-borne coatins. The properties of hydrolyzates (HPPENK) in different hydrolysis time were characterized by FT-IR and H-1-NMR, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), contact angle (water) as well as solubility measurements. The results indicated that, along with the prolonged hydrolysis time, nitrile groups conversion ratio and glass transition temperature (Tg) of hydrolyzates increase, whereas weight loss ratio of HPPENK decreases. As expected, the hydrophilicity of HPPENK was improved greatly, e.g., when CN conversion ratio was 93.82%, the water contact angles were found to decrease from 75.3 degrees of PPENK to 54.4 degrees of HPPENK. HPPENKc dispersion has no separation more than 20 days in terms of shelf-life.