Preparation and properties of two-component hydrogels based on 2-acrylamido-2-methylpropane sulphonic acid

Abdel‐Azim, Abdel‐Azim A.; Farahat, Medhat S.; Atta, Aiman M.; Abdel-Fattah, A.A.

doi:10.1002/(sici)1099-1581(199805)9:5<282::aid-pat755>3.0.co;2-n

Cited by 36 publications

(22 citation statements)

References 8 publications

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“…Even fewer have investigated the polymerization kinetics and, specifically, copolymer reactivity ratios. In previous studies, AMPS and AAc have been copolymerized in the presence of crosslinking agents [28][29][30], and the crosslinked products have been grafted onto backbones via free radical graft polymerization [31,32] to produce hydrogels. Only two studies [28,33] have been identified that provided reactivity ratio estimates for the AMPS/AAc copolymer along with a description of synthesis and characterization methods (see Table 3).…”

Section: Literature Background For Amps/aacmentioning

confidence: 99%

“…In previous studies, AMPS and AAc have been copolymerized in the presence of crosslinking agents [28][29][30], and the crosslinked products have been grafted onto backbones via free radical graft polymerization [31,32] to produce hydrogels. Only two studies [28,33] have been identified that provided reactivity ratio estimates for the AMPS/AAc copolymer along with a description of synthesis and characterization methods (see Table 3). In the work by Abdel-Azim et al [28], reactivity ratios for the AMPS/AAc copolymer were estimated using the Fineman-Ross and Kelen-Tudos (linear) methods.…”

Section: Literature Background For Amps/aacmentioning

confidence: 99%

“…Only two studies [28,33] have been identified that provided reactivity ratio estimates for the AMPS/AAc copolymer along with a description of synthesis and characterization methods (see Table 3). In the work by Abdel-Azim et al [28], reactivity ratios for the AMPS/AAc copolymer were estimated using the Fineman-Ross and Kelen-Tudos (linear) methods. The authors chose to average the two values obtained by the two techniques, which can be a gross approximation for r AMPS .…”

Section: Literature Background For Amps/aacmentioning

confidence: 99%

“…Preliminary experiments for AMPS/AAc were based on literature values from Abdel-Azim et al [28]. Both preliminary feed compositions (f AMPS,0 = 0.15 and f AMPS,0 = 0.80) presented unique concerns (see Table 4).…”

Section: Design Of Experiments For Amps/aacmentioning

confidence: 99%

“…The cumulative composition model was applied to the data (using direct numerical integration as described in Kazemi et al [8]) through EVM. Point estimates from the literature [28], the preliminary experiments and the optimally designed experiments are presented in Figure 5, along with their corresponding JCRs. The point estimate from Abdel-Azim et al [28] is very close to the edge of the preliminary JCR.…”

Section: Reactivity Ratio Estimationmentioning

confidence: 99%

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Optimal Design for Reactivity Ratio Estimation: A Comparison of Techniques for AMPS/Acrylamide and AMPS/Acrylic Acid Copolymerizations

2015

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Water-soluble polymers of acrylamide (AAm) and acrylic acid (AAc) have significant potential in enhanced oil recovery, as well as in other specialty applications. To improve the shear strength of the polymer, a third comonomer, 2-acrylamido-2-methylpropane sulfonic acid (AMPS), can be added to the pre-polymerization mixture. Copolymerization kinetics of AAm/AAc are well studied, but little is known about the other comonomer pairs (AMPS/AAm and AMPS/AAc). Hence, reactivity ratios for AMPS/AAm and AMPS/AAc copolymerization must be established first. A key aspect in the estimation of reliable reactivity ratios is design of experiments, which minimizes the number of experiments and provides increased information content (resulting in more precise parameter estimates). However, design of experiments is hardly ever used during copolymerization parameter estimation schemes. In the current work, copolymerization experiments for both AMPS/AAm and AMPS/AAc are designed using two optimal techniques (Tidwell-Mortimer and the error-in-variables-model (EVM)). From these optimally designed experiments, accurate reactivity ratio estimates are determined for AMPS/AAm (r AMPS = 0.18, r AAm = 0.85) and AMPS/AAc (r AMPS = 0.19, r AAc = 0.86).

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Section: Literature Background For Amps/aacmentioning

confidence: 99%

Section: Literature Background For Amps/aacmentioning

confidence: 99%

Section: Literature Background For Amps/aacmentioning

confidence: 99%

Section: Design Of Experiments For Amps/aacmentioning

confidence: 99%

Section: Reactivity Ratio Estimationmentioning

confidence: 99%

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Optimal Design for Reactivity Ratio Estimation: A Comparison of Techniques for AMPS/Acrylamide and AMPS/Acrylic Acid Copolymerizations

2015

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Study of poly(acrylamide‐co‐2‐acrylamido‐2‐methylpropane sulfonic acid) hydrogels made using gamma radiation initiation

Zhang

Easteal

2003

J of Applied Polymer Sci

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Poly(acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid) hydrogels were synthesized using gamma-radiation-initiated polymerization. The progress of copolymerization and crosslinking was observed by viscosity measurement on reaction mixtures subjected to varying radiation doses. The copolymer gels were characterized by differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, infrared spectroscopy, and elemental analysis. The swelling behavior and other properties of the gels were found to be very similar to those of poly(acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid) hydrogels synthesized using conventional free-radical initiation in the presence of crosslinkers.

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Design and development of temperature sensitive porous poly(NIPAAm‐AMPS) hydrogels for drug release of doxorubicin‐a cancer chemotherapy drug

Varaprasad

Ravindra

Reddy

et al. 2010

J of Applied Polymer Sci

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Temperature sensitive polymer network porous hydrogels were developed with N-Isopropylacrylamide (NIPAAm) and AMPS (2-acrylamido-2-methyl-1-propanesulfonicacid), as well as with sucrose as porogen by crosslinking with hydrophilic crosslinker N,N 1 -methylenebisacrylamide (MBA). The temperature responsive behaviour, the swelling/deswelling kinetics of the hydrogels were investigated. The structural and morphological characterizations of the developed hydrogels were obtained from FTIR spectroscopy and scanning electron microscopy (SEM). The increment in the lower critical solution temperature (LCST) of NIPAAm hydrogels can be done with the help of AMPS and it is confirmed with differential scanning calorimetry (DSC) as well as temperature dependent swelling curves. The model cancer chemotherapy drug Doxorubicin (Dox) was loaded into theses hydrogels and the release studies as well as the released profiles of the drug showed that more than 8-54% of the loaded drug was released in the first half-an-hour at a buffer solution of 7.4 and the rest of the drug was released slowly.

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Preparation and properties of two-component hydrogels based on 2-acrylamido-2-methylpropane sulphonic acid

Cited by 36 publications

References 8 publications

Optimal Design for Reactivity Ratio Estimation: A Comparison of Techniques for AMPS/Acrylamide and AMPS/Acrylic Acid Copolymerizations

Optimal Design for Reactivity Ratio Estimation: A Comparison of Techniques for AMPS/Acrylamide and AMPS/Acrylic Acid Copolymerizations

Study of poly(acrylamide‐co‐2‐acrylamido‐2‐methylpropane sulfonic acid) hydrogels made using gamma radiation initiation

Design and development of temperature sensitive porous poly(NIPAAm‐AMPS) hydrogels for drug release of doxorubicin‐a cancer chemotherapy drug

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