Synthesis and Thermal behavior of poly (ethylene oxide) poly (N-substituted urethane)

سال انتشار: 1384
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,608

فایل این مقاله در 14 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

NICEC10_452

تاریخ نمایه سازی: 6 بهمن 1385

چکیده مقاله:

Waterborne polyurethane as a new polymer dispersion was synthesized by using relatively hydrophilic polyols. Poly (N-Substituted urethane)s with different molecular weight of polyethylene glycol monomethyl ether side chain were synthesized form sodium hydride, chlorinated polyethylene glycol monomethyl ether (PEGMME), and polyether and polyester urethane containing poly tertahydrofuran or polycaprolactone/ Toluene diisocyanate and 1, 4- butanediol. The chemical structures were characterized with FTIR and FT1HNMR. To investigate the effect of different MW of N-substituted side chain on the morphology, thermal property and particle size distribution of the final product, we used differential scanning calorimetry and laser light scattering. N-Substitution of polyurethane had significant influences on thermal properties and solubility of the resulting material.Tg of the N-substituted urethane decreases with N- substitution and gradually increases with increasing molecular weight of the substituted side chain. This is more obvious in higher molecular weight. The particle size of final water borne PU emulsion also decreases with increasing MW of PEGMME. The decreasing particle size may be due to increased chain flexibility and or hydrophilicity of N-substituted polyurethanes.

کلیدواژه ها:

Polyurethanes ، water borne ، N-modification ، polyethylene glycol monomethyl ether

نویسندگان

Seyed Mohaghegh

Faculty of Polymer Science, Iran Polymer and Petrochemical Institute,

Barikani

Faculty of Polymer Science, Iran Polymer and Petrochemical Institute,

Entezami

Faculty of Chemistry, Tabriz University, Tabriz, Iran

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • Hepburn C., Polyurethane elastomers, 2ed; Elsevier Applied Science: London, (1992). ...
  • Ulrich H., in Encyclopedia of Chemical Technology, Wiley- Interscience, New ...
  • Kweon J.O., Lee Y.K., Noh S.T., Synthesis and thermal behavior ...
  • Yeganeh H., Barikani M., Khodabadi F.N., Synthesis and properties of ...
  • Cho H.S., Noh S.T., Preparation and characteriz ation of N-methyl- ...
  • Liaw D.J., Lin S. P., Phosphorus containing polyurethanes based On ...
  • Sirriev H., Georgiev S., Borissov G., Phosphorus containing P olyurethanes, ...
  • in Iranian Chemical Engineering Congress (IChEC10), Sistan & Balochestan University ...
  • Derand H., Jannashi P.:; Wesslen B., Grafted copolymers prepared by ...
  • Barikani M. and Hepburn _ Isocyanurate crosslinking as a means ...
  • Szwarc M., Critical examination of some basic concepts of ionic ...
  • Orvik J. A., Effect of crown ethers on rates and ...
  • Yen M.S., Kuo S.C., Effects of mixing procedure on the ...
  • Seyed Mohaghegh S.M., Barikani M., Entezami A., Preparation, and properties ...
  • in Iranian Chemical Engineering Congress (IChEC10), Sistan & Balochestan University ...
  • نمایش کامل مراجع