Precipitation photopolymerization of acrylic acid-co-itaconic acid: effects of temperature and initiator concentration

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 510

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شناسه ملی سند علمی:

NICEC16_306

تاریخ نمایه سازی: 7 خرداد 1398

چکیده مقاله:

Polymerization of acrylic acid (AA) and Itaconic acid (IA), the most common monomers in the glass-ionomer cements was accomplished through precipitation photopolymerization in acetone. A 25 wt% solution of AA / IA (70/30 by weight) was prepared. The polymerization was carried under 4 hours light irradiation by Two UV LED lamps with 360 nm wavelength. The effects of concentration of diphenyl(2,4,6-trimethyl benzoyl)phosphine oxide (TPO) photoinitiator (2.5 mol% and 4 mol% ) and temperature (298 K and 323 K) on the conversion and copolymer composition were investigated by weighing and ˡH-NMR. The results showed a significant increase in conversion and mole fraction of itaconic acid in the copolymer.

کلیدواژه ها:

photopolymerization ، poly(acrylic acid- co-itaconic acid) ، photoinitiator

نویسندگان

Seyede Fateme Khalkhali

Iran Polymer and petrochemical institute of Tehran, Tehran, Iran

Mohammad Atai

Iran Polymer and petrochemical institute of Tehran, Tehran, Iran

Azizollah Nodehi

Iran Polymer and petrochemical institute of Tehran, Tehran, Iran