Low temperature splinting activity and catalytic behavior of nano Ag doped sulphamicacid bridged diblock copolymer

Abstract

A novel silver nanoparticle doped diblock copolymer was synthesized by a 3‐step process via bulk polymerization process under nitrogen atmosphere. The above prepared polymer is characterized by FTIR spectroscopy, fluorescence emission spectroscopy, circular dichroism (CD), HRTEM, and FESEM. The sulphamicacid end capped poly(ε‐caprolactone) (P1) system exhibited higher tensile strength than the sulphamicacid bridged diblock copolymer (P2) and nano Ag doped sulphamicacid bridged diblock copolymer (P3) systems. The splinting activity of the diblock copolymers was tested and confirmed the low temperature splinting activity of the diblock copolymer. The Ag nanoparticle catalyzed catalytic reduction of p‐nitrophenol (NiP) was tested, and the apparent rate constant (kapp) was determined as 7.36 × 10−3 sec−1. The thermal studies were carried out by DSC and TGA methods. The TGA study declared that the P1 system has higher degradation temperature than the P2 and P3 systems. The P1 system has higher melting temperature (Tm) (75.5°C) than the P2 and P3 systems. The CD study indicated that the conformation of sulphamicacid was not changed even after the formation of nano Ag doped sulphamicacid bridged diblock copolymer.

Synthesis, characterization and sustainable drug release activity of drug bridged diblock copolymer

“…The present system yielded lower tensile strength value than the PCL coated fabric. This can be explained on the bases of increased moisture absorbing [20][21][22] capacity of diblock copolymer grafted fabric. The moisture content destabilized the tensile strength value.…”

“…In 2012, Nomura et al [14] used V complexes as an initiator/catalyst for the ROP of THF. Different initiating systems such as keggin type heteropolyacids [15], cationic species [16], norbornyl cation [17], magamite-H + [18], glycosyl [19] and aminoacids [20][21][22] were used for the ROP of THF. Recently, dye initiated ROP of THF was reported in the literature [23].…”

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

“…The preparation of PCL had been employed using the literature procedure [3]. One g of CL monomer was charged in a 25 ml capacity round-bottomed ask.…”

“…The [M 0 /I 0 ] ratio was kept as 10, 50, 100, 200 and 400. After the thorough mixing, the RB ask was placed at 160 °C in an oil bath to initiate the ROP of CL [2,3]. After 2 hours of ROP, a highly viscous mass was obtained.…”

“…The increase in M w of PCL was noticed owing to the decreasing of [Mn-MA] with the increasing ratio of Monomer/Mn-MA resulting with there was an increase in T m of PCL from 68.4 to 71.6° C (Table 1). The increase in T m is purely due to the increase in M w of PCL [3]. The TG thermograms of PCL tagged Mn-MA systems prepared at various [Monomer/Mn-MA] ratios are represented in Fig.…”