Journal ArticleDOI
Radiation Graft Copolymerization of Acrylic Acid and N-Isopropylacrylamide from binary mixtures onto Polytetrafluoroethylene
TLDR
In this paper, acrylic acid and N-isopropylacrylamide were grafted from their binary mixtures in water onto polytetrafluoroethylene filament γ-preirradiated in air.Abstract:
Acrylic acid and N-isopropylacrylamide were grafted from
their binary mixtures in water onto polytetrafluoroethylene
films γ-preirradiated in air. Effects of preirradiation dose as
well as temperature of grafting on efficiency of this process
were investigated, the optimal values of dose and temperature
were 20 kGy and 50 °C, respectively. The calculated monomers
reactivity ratios by their graft copolymerization
(r1 and r2 ) were
0.35 and 0.01, respectively. The grafted copolymers exhibited a
temperature-responsive character in the range of 17-30
°C.read more
Citations
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Journal ArticleDOI
Modification and characterization of cellulosic cotton fibers for efficient immobilization of urease.
Mohamed Monier,A.M.A. El-Sokkary +1 more
TL;DR: The results showed that the optimum temperature of immobilized Urease was 35°C, which was higher than that of the free enzyme (30°C), and the immobilized urease exhibited a higher relative activity than that
Journal ArticleDOI
Radiation-induced grafting of N-isopropylacrylamide and acrylic acid onto polypropylene films by two step method
TL;DR: Binary graft copolymerization of pH sensitive acrylic acid (AAc) and thermosensitive N-isopropylacrylamide (NIPAAm) monomers onto pre-irradiated polypropylene films (PP) was carried out by two individual steps using a Co60 gamma radiation source as mentioned in this paper.
Journal ArticleDOI
Preparation of thermosensitive membranes by radiation grafting of acrylic acid/ N-isopropyl acrylamide binary mixture on PET fabric
TL;DR: In this article, a binary mixture of N-isopropyl acrylamide (NIPAAm) and acrylic acid (AA) was grafted on polyester fabric as a base material to introduce thermosensitive poly( N -isopric acrylide) pendant chains having LCST slightly higher than 37°C in the membrane.
Journal ArticleDOI
Temperature Sensitive Behavior of Poly(N‐isopropylacrylamide) Grafted Onto Electron Beam‐Irradiated Poly(propylene)
TL;DR: In this paper, NIPAAm was graft-polymerized from its acetone solution onto poly(propylene) (PP) films, after electron-beam irradiation in the presence of air oxygen, and the effects of pre-irradiation dose as well as monomer concentration, reaction temperature and reaction time on the grafting efficiency were investigated.
Journal ArticleDOI
Interpenetrating Thermo and pH Stimuli‐Responsive Polymer Networks of PAAc/PNIPAAm Grafted onto PP
TL;DR: In this article, a new strategy was used to prepare an interpenetrating polymer network of two stimuli-responsive polymers, a thermosensitive poly N-isopropylacrylamide (PNIPAAm) and a pH sensitive poly(acrylic acid) (PAAc) grafted onto poly(propylene) (PP) films (PP-g-pAAc).
References
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Book
Applied Radiation Chemistry: Radiation Processing
Alexei K. Pikaev,Robert J. Woods +1 more
TL;DR: Radiation: Sources and Characteristics. Selected Topics in Radiation Chemistry as mentioned in this paper, where the authors discuss the interaction of radiation with matter, and the application of radiation in waste management and medical products.
Book
Radiation Chemistry of Polymers
V. S. Ivanov,E. A. Koroleva +1 more
TL;DR: In this paper, the main concepts, principles, methods and instrumentation of the radiation chemistry of polymers are discussed, including the types of ionizing radiation units of characteristics of radiation field and the activity of radionuclides sources of ionising radiation dosimetry interaction of radiation with matter calculation of radiation - chemical yields.
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Reactivity ratios during radiation-induced grafting of comonomer mixtures onto polyester fabrics
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B.D. Gupta,A. Chapiro +1 more