Grafting of telechelic poly(lactic‐co‐glycolic acid) onto O₂ plasma‐treated polypropylene flakes

Abstract

ABSTRACT:In this work, we described a facile approach to preparing polypropylene (PP) surface functionalized with telechelic poly(lactic-co-glycolic acid) (HO-PLGA-COOH). The PP flakes were first treated with oxygen plasma and then grafted with different molecular weight PLGA (M w ¼ 50, 100, and 300 K) in dry dichloromethane solution with the addition of phosphorus pentachloride (PCl 5 ). The attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy measurements were used to characterize the composition of the PP surface. The appearance of 1756 cm À1 for carbonyl (C¼ ¼O) stretching and 1090 cm À1 for CAOAC and the morphologies observations by atomic force microscopy show that PLGA graft covered the surface of PP flake. The IR intensity at 1756 cm À1 increases with the decreasing M w of PLGA, and the molecular weight of PLGA also influence the grafting of PLGA on PP. The contact angle was used to monitor the changes in hydrophilicity of PP flake surface along the treatment procedure. PLGA-grafted PP (PPg-PLGA) was eventually obtained.

Green process for green materials: viable low-temperature lipase-catalysed synthesis of renewable telechelics in supercritical CO 2

“…The naming scheme used in this paper is detailed in Table 1. Table 1 13 C-NMR analysis. NMR analyses were conducted on a Bruker DPX300 spectrometer in CDCl3 (20 mg/mL).…”

“…(ii) 1 H and 13 C nuclear magnetic resonance (NMR) analysis NMR analyses were conducted on a Bruker DPX300 spectrometer in CDCl 3 (20 mg ml −1 ). The number of scans was 16 for 1 H (300 MHz) and 4096 for 13 C (75 MHz).…”

“…Recently, great importance has been given to low molecular weight (between 1000 and 4000 g/mol) telechelic polyesters (8)(9)(10)(11). These are functional polymers that carry the same functional group at both ends (12) and find applications in surface modification (8,9), medical materials (13), block copolymer formation (14), cross-linked networks (10,15) etc. Low molecular weights are often desirable in order to obtain low-viscosity materials and good filmability (8,10,11).…”

Adhesion of grafted polypropylene plates with enzymatically modified chitosan solutions and analysis of failed surfaces by X‐ray photoelectron spectroscopy

“…To solve this problem, many researchers have carried out investigations on their surface modification [1][2][3][4][5] and development of novel adhesives. As these surface properties are unfavorable to their application related with surface properties, the use of the polyolefin materials was frequently limited.…”

Self-assembly study of complex topological structure constructing from telechelic polymer systems

“…Which can build polymers with complex topological structure such as block copolymers, graft copolymers, hyperbranched polymers and dendrimers, etc. Therefore, significant economic and research value belong to this active telechelic polymer [7][8][9][10][11][12][13][14]. At present, telechelic polymers have been widely used in biomedicine, optical research, chemical production and other fields [15][16][17][18].…”