Studying reactivity ratios and physical properties of methacrylic acid - ethyl acrylate copolymer

  • Trần Vũ Thắng
  • Phạm Thị Thu Hà
  • Nguyễn Văn Khôi
  • Nguyễn Văn Mạnh
  • Phạm Thị Thu Trang

Abstract

The copolymerization of methacrylic acid (MAA) and ethyl acrylate (EA) was performed by free radical polymerization in ethanol, in the presence of 2,2-azobisisobutyronitnle (AIBN) as an initiator. The reactivity ratios of monomers were caculatured by Kelen-Tudos method using data from elemental analysis. The charaterstics of the copolymes were studied by IR spectroscopy, DSC, gel permeation chromatography (GPC) and TGA analysis methods. The results showed that MAA has higher reactivity than EA (tMAA = 2.63 and Tea = 0 21), glass transiton temperature of copolyme Tg = 146 ®c, the average molecular weight of the copolymers Mw - 251000 (u) and the polydispersity index (PDĨ) Mw/Mn =1.70.

điểm /   đánh giá
Published
2017-09-28
Section
Articles