ASETİL BENZOFURAN METAKRİLAT-KO-STİREN KOPOLİMERLERİNİN SENTEZİ, TERMAL ÖZELLİKLERİ, AKTİVASYON ENERJİSİ ve REAKTİVİTE ORANLARININ HESAPLANMASI

Abstract

2-Asetil benzofuran metakrilat (ABM) ve stiren (St) benzoil peroksit (Bz2O2) varlığında beş farklı yüzde oranlarında % (10, 30 50, 70, 90) kopolimerler serbest radikallik yoldan sentezlendi.
Polimerler, dioksanda çözülüp petrol eterinde çöktürüldü. Kopolimerler, elementel analiz, 1HNMR, FT-IR, DSC ve TGA, GPC ile karakterize edildi. Poli(ABM-ko-St) kopolimer serilerinde
ABM oranı arttıkça bozunma sıcaklığının düştüğü, camsı geçiş sıcaklıkları ABM oranı artıkça (127-136 0C) yükseldiği gözlendi. Kopolimerdeki monomer reaktiflik oranları. Kelen Tudos ve Fineman Ross metodlarından r1.r2 değeri 0 ve 1 aralığında bulundu. Kopolimerlerin aktivasyon enerjileri Arrhenius denkleminden (23-30 Joule) bulundu.

Keywords

• benzofuran
• activation energy
• methacrylate
• reactivity ratios

ASETİL BENZOFURAN METAKRİLAT-KO-STİREN KOPOLİMERLERİNİN SENTEZİ, TERMAL ÖZELLİKLERİ, AKTİVASYON ENERJİSİ ve REAKTİVİTE ORANLARININ HESAPLANMASI

Abstract

Copolymers of five percentages (10, 30, 50, 70, 90) were synthesized from 2-acetyl benzofuran methacrylate (ABM) and styrene (St) in the presence of benzoyl peroxide (Bz2O2) by free radicals. The polymers were dissolved in dioxane and precipitated in petroleum ether. Copolymers were characterized by elemental analysis, 1H-NMR, FT-IR, DSC, TGA and GPC. It
was observed that as the ABM ratio increased in the poly(ABM-co-St) copolymer series, the degradation temperature decreased and as the ABM ratio increased, the glass transition
temperature also increased (127-136 °C). The monomer reactivity ratios in the copolymer were found to be between 0 and 1 at r1.r2 values from Kelen Tudos and Fineman Ross methods. The activation energies of the copolymers were found in the Arrhenius equation (23-30 Joules).

Keywords

• Benzofuran
• activation energy
• methacrylate
• reactivity ratios
• thermal analysis

References

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