Synthesis, characterization and non-isothermal degradation kinetics of poly(ε-caprolactone)/Fe3O4-dye nanocomposites

Abstract

Congo red (CR) dye functionalized magnetic nanoparticle was synthesized and characterized by Fourier Transform Infra Red, UV-visible, fluorescence emission spectra, field emission scanning electron microscopy and vibrating sample magnetometry like analytical techniques. The prepared nanohybrid was chemically tagged with poly(ε-caprolactone) (PCL) via ring opening polymerization of ε-caprolactone. The PCL/Fe 3 O 4-CR nanocomposites were characterized by the same techniques and differential scanning calorimetry and thermogravimetric analysis methods. The magnetic moment values of the Fe 3 O 4 after the formation of the nanohybrid and nanocomposite were found to be reduced due to the encapsulation and surface functionalization effects. The magnetic moment value of Fe 3 O 4 was decreased for the nanohybrid and nanohyrbid tagged PCL. The non-isothermal degradation kinetics was characterized in order to find out the energy of activation (E a) for the thermal degradation of the PCL. For the sake of comparison, the non-isothermal degradation kinetics of the methylorange functionalized Fe 3 O 4 end capped PCL was carried out and the results were critically compared.

Synthesis and characterization of functionalized polyvinylidene fluoride (PVDF) and the high temperature catalytic activity of PVDF‐g‐MAH/V2O5 nanocomposite toward transesterification reaction

“…Among the systems considered, the PVDF4 system exhibited the highest T m value of 169.9°C (Table 2). Even though, the bulky size of the CR dye, [ 61 ] due to the presence of pendant –NH 2 group, the steric effect was reduced to some extent. The PVDF5 system exhibited the lowest T m value of 154.6°C due to the less steric effect when compared with PVDF4 system.…”

Synthesis and characterization of Metal-mercaptoacetate hybrids and its application towards ring opening polymerization of ε-caprolactone: A comparative study

“…Figure 7A (b) illustrates the XRD of Mn-MA end-capped PCL with a sharp peak at 21.49, 22.24 and 23.76°c orresponding to various crystal planes of semi-crystalline PCL as mentioned in the gure [38]. Due to the low content of Mn-MA in the PCL matrix, the crystalline peaks of the Mn-MA system are compressed.…”

“…Figure 7B (b) demonstrates the XRD of PCL prepared at [Monomer/Mo-MA] = 100. The assigned diffraction peaks at 21.4 0 , 22.1 0 and 23.8 0 are attributed to the d (111) , d (110) and d (200) crystal planes of semi-crystalline PCL[38]. The crystalline peaks of Mo-MA are not appeared due to its very low content in the PCL matrix.…”

Structural and Thermal Studies of Fluorescein and Rhodamin6G Grafted Diblock Copolymers

“…Barium mercaptoacetate had been used as a lone chemical initiator for the polymerization of CL [23]. The Fe 3 O 4 /congored nanohybrid was used as an initiator for the polymerization of CL by ROP [24]. Agathian et al [25] studied the ROP of CL using the cotton ber as an initiator.…”