Open AccessImproved Thermal Stability of Radiation Degradative Poly(methyl methacrylate) by Blending with Poly(ethylene glycol)
Author(s) -
Samera Ali Al-Gahtany,
Dalal Mohamed Alshangiti,
Mohamed Madani,
Mohamed Mohamady Ghobashy
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22575
Subject(s) - differential scanning calorimetry , glass transition , miscibility , polymer , polymer chemistry , ethylene glycol , peg ratio , poly(methyl methacrylate) , methyl methacrylate , fourier transform infrared spectroscopy , chemical engineering , materials science , thermal stability , chemistry , methacrylate , polymer blend , copolymer , composite material , organic chemistry , physics , finance , engineering , economics , thermodynamics
A blend polymer consists of poly(methyl methacrylate) (PMMA) and poly(ethylene glycol) (PEG) infour ratios 20:0, 18:2, 16:4 and 14:6. The blend polymer (PMMA/PEG) was characterized by usingdifferential scanning calorimetry (DSC), TGA and FTIR. FTIR analysis proved that the lack ofmiscibility and interactions between PMMA (hydrophobic) and PEG (hydrophilic) were not due tohydrogen bonding but gamma irradiation at doses up to 20 kGy. Furthermore, DSC thermograms ofthe blend polymers display a positive deviation during the glass transition temperature (Tg) of PMMAdue to gamma irradiation-induced PEG crosslinking, decreasing the molecular motion and chainrelaxation between the two polymers. Blends that are not irradiated show negative Tg deviation fromthe corresponding values due to plasticization of PEG. Furthermore, the melting point (Tm) of PMMAincreased with an increase in PEG, which acts as a filler at high temperatures.