Melt functionalization of LDPE with thio ester, amino ester, and hydroxy ester by thermolysis method—An FTIR study

Abstract

Low density poly(ethylene) (LDPE) was melt functionalized with three different esters namely, thio ester, amino ester, and hydroxy ester under inert atmosphere at 160 C with different experimental conditions. During the functionalization reaction, crosslinking (C.L) and C¼ ¼C formation are the simultaneous competitive reactions. FTIR-RI analysis method was used to determine the % functionalization onto LDPE backbone and the order of functionalization reaction. Thermogravemetric analysis (TGA) and Differential scanning calorimetry (DSC) were used to assess the thermal properties of the functionalized LDPE. Suitable reaction scheme was proposed.

Lattice Strain and Surface Activity of Ternary Nanoalloys under the Propane Oxidation Condition

“…The peaks at 1590–1607 (Figure B) and 1578 cm –1 (Figure C) are assigned to the adsorbed acetate v as (COO) species. ,, The peaks from 1681 to 1714 cm –1 (Figure C) and 1672 cm –1 (Figure B) can be assigned to the acetone v (CO) stretching mode . The bands at 1737 cm –1 (Figure B) and 1720–1730 cm –1 (Figure A) are likely due to the absorption of the carbonyl group with the aliphatic ester function υ (CO). , The band at 1650 cm –1 (Figure A) is in agreement with the bicarbonate v as (OCO – ) species stretching bond. , The enolate species (CH 2 CH–O) exhibit bands at 1636, 1653, and 1400 cm –1 (Figure C). , The band at 1591 cm –1 is consistent with the absorption of the formate v as (COO) species (Figure A). The peaks at 1464 (Figure A) and 1470 cm –1 (Figure B) are attributed to the adsorbed methoxy δ as (CH 3 ) groups. , The bands at 1500, 1532, and 1256 cm –1 (Figure C), 1544 (Figure B), and 1549 cm –1 (Figure A) are most likely attributed to v as (COO) and v s (OCO) monodentate carbonate species .…”