Effect of Water Soluble Polymers on Radiation Vulcanized Natural Rubber Latex Films

1999 ◽  
Vol 72 (2) ◽  
pp. 308-317 ◽  
Author(s):  
Siby Varghese ◽  
Yosuke Katsumura ◽  
Keizo Makuuchi ◽  
Fumio Yoshi
Keyword(s):  
Natural Rubber Latex ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Radiation Processing ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Drastic Increase ◽  
Poly Ethylene

Abstract Technological properties of radiation vulcanized latex after mixing with water soluble polymers (WSP) such as poly(vinyl alcohol), poly(ethylene oxide) etc. have been studied in detail. The properties of water soluble polymer incorporated vulcanizates depend mainly on the type of the polymer blended into the latex. Most of the polymers showed a drastic increase in tear strength with polymer content and a reduction in tackiness of the vulcanized films. Radiation processing increases the water soluble protein content in the serum phase whereas that in the rubber phase decreases. Addition of water soluble polymer causes the fast leaching of soluble proteins from the dried films, which reduces the prolonged leaching commonly adopted for rubber vulcanizates. Aging properties of radiation vulcanized films incorporated with water soluble polymers are excellent. The thermal degradation behavior of radiation vulcanized films and that of water soluble polymer incorporated films is almost the same. Transparency of the rubber films can be increased by the addition of suitable water soluble polymers.

Wormlike micelles versus water-soluble polymers as rheology-modifiers: similarities and differences

2017 ◽  
Vol 19 (36) ◽  
pp. 24458-24466 ◽  
Author(s):  
Ji Wang ◽  
Yujun Feng ◽  
Niti R. Agrawal ◽  
Srinivasa R. Raghavan
Keyword(s):  
Aqueous Solution ◽  
Water Soluble ◽  
Wormlike Micelles ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Water Soluble Polymers ◽  
Rheological Behaviors ◽  
Soluble Polymers ◽  
Similarities And Differences

Rheological behaviors and aqueous solution microstructures of wormlike micelles and a water-soluble polymer are compared.

Effect of Water Soluble Polymer, Polyethyleneglycol, and Glass-Forming Compounds on Cell Fusion

1982 ◽  
Vol 37 (11-12) ◽  
pp. 1234-1239 ◽  
Author(s):  
Fumio Yoshii ◽  
Isao Kaetsu
Keyword(s):  
T Cells ◽  
Cell Fusion ◽  
Water Soluble ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Glass Forming ◽  
Effect Of Water

Abstract The cell fusion of Molt T-cells was investigated in the presence of water soluble polymer, polyethyleneglycol (PEG) and glass-forming monomers. In cell fusion with PEG only, inactivation of the cell occurred within 2 min. However, in the presence of PEG and water soluble polymer, most of the fused and unfused cells lived even after fusion times of more than 10 min. It was observed that water soluble polymer prevented the inactivation of cells during fusion as a protectant. As the result, ratio of fused cells increased in the presence of water soluble polymers. Some glass-forming monomers used as new fusogens such as M-23G (n = 23) and M-50G (n = 50) monomers having long oxyethylene chains in the methoxypolyethyleneglycol methacrylate, CH3O-(-CH2CH2-O)n-CO-C(CH3)=CH2 as well as PEG #2000 indicated large promoting and protecting effects on cell fusion.

Effect of Salt on the Viscosity and Microstructure of Hydrophobically Associating Water-Soluble Polymer

2011 ◽  
Vol 347-353 ◽  
pp. 1673-1677
Author(s):  
Rui zhang ◽  
Ni Qin ◽  
Bing Yan Hu ◽  
Zhong Bing Ye
Keyword(s):  
Aqueous Solution ◽  
Atomic Force Microscopy ◽  
Water Soluble ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Water Soluble Polymers ◽  
Force Microscopy ◽  
Soluble Polymers ◽  
Atomic Force ◽  
Hydrophobically Associating

The effects of Na+, Ca2+, and Mg2+ on hydrophobically associating water-soluble polymers (HAWP) were studied in this paper.Their decreased viscosity in aqueous solution at different salt concentrations were measured and the corresponding microstructure by Atomic Force Microscopy (AFM) were determined. The results show that the destructive microstrucure was the intrinsic reason for the decresed viscosity. Among the three salt aqueous solutins, CaCl2 has the highest strong destructive capability to the microstucute of HAWP.

scholarly journals Self-Healing Polymer-Clay Hybrids by Facile Complexation of a Waterborne Polymer with a Clay

2021 ◽  
Author(s):  
Aranee Pleng Teepakakorn ◽  
Makoto Ogawa
Keyword(s):  
Vinyl Alcohol ◽  
Aqueous Media ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Smectite Clay

Water-induced self-healing materials were prepared by the hybridization of a water-soluble polymer, poly(vinyl alcohol), with a smectite clay by mixing in an aqueous media and subsequent casting. Without using chemical...

Flow of Hydrophobically Modified Water-Soluble-Polymer Solutions in Porous Media: New Experimental Insights in the Diluted Regime

SPE Journal ◽  
2010 ◽  
Vol 16 (01) ◽  
pp. 43-54 ◽  
Author(s):  
Guillaume Dupuis ◽  
David Rousseau ◽  
René Tabary ◽  
Bruno Grassl
Keyword(s):  
Oil Recovery ◽  
Polymer Concentration ◽  
Adsorbed Layer ◽  
Water Soluble ◽  
Water Soluble Polymer ◽  
Improved Oil Recovery ◽  
Water Soluble Polymers ◽  
Resistance Factors ◽  
Soluble Polymers ◽  
Hydrophobically Modified

Summary The specific molecular structure of hydrophobically modified water-soluble polymers (HMWSPs), also called hydrophobically associative polymers, gives them interesting thickening and surface-adsorption abilities compared with classical water-soluble polymers (WSPs), which could be useful in polymer-flooding and well-treatment operations. However, their strong adsorption obviously can impair their injectivity, and, conversely, the shear sensitivity of their gels can be detrimental to well treatments. Determining for which improved-oil-recovery (IOR) application HMWSPs are best suited, therefore, remains difficult. The aim of this work is to bring new insight regarding the interaction mechanisms between HMWSPs and rock matrix and the consequences concerning their propagation in reservoirs. A consistent set of HMWSPs with sulfonated polyacrylamide backbones and alkyl hydrophobic side chains together with an equivalent WSP was synthesized and fully characterized. HMWSP and WSP solutions were then injected in model granular packs. As expected, with HMWSPs, high resistance factors (or mobility reductions, Rm) were observed. Yet, within the limit of the injected volumes, the effluent showed the same viscosity and polymer concentration as the injected solutions. A first significant outcome concerns the specificities of the Rm curves during HMWSP injections. Rm increases took place in two steps. The first corresponded to the propagation of the viscous front, as observed with WSP, whereas the second was markedly delayed, occurring several pore volumes (PV) after the breakthrough. This result is not compatible with the classical picture of multilayer adsorption of HMWSPs but suggests that injectivity is controlled solely by the adsorption of minor polymeric species. This hypothesis was confirmed by reinjecting the collected effluents into fresh cores; no second-step Rm increases were observed. Brine injections in HMWSP-treated cores revealed high residual resistance factors (or irreversible permeability reductions, Rk), which can be attributed to the presence of thick polymer-adsorbed layers on the pore surface. Nevertheless, Rk values strongly decreased when increasing the brine-flow rate. This second significant outcome shows that the adsorbed-layer thickness is shear-controlled. These new results should lead to proposing new adapted filtration and injection procedures for HMWSPs, aimed, in particular, at improving their injectivity.

Optical Characterisation of Non-Covalent Interactions between Non-Conjugated Polymers and Chemically Converted Graphene

2014 ◽  
Vol 67 (1) ◽  
pp. 168 ◽  
Author(s):  
Yufei Wang ◽  
Xueliang Hou ◽  
Chi Cheng ◽  
Ling Qiu ◽  
Xuehua Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Water Soluble Polymers ◽  
Force Microscopy ◽  
Chemically Converted Graphene ◽  
Non Covalent Interactions ◽  
Poly Ethylene ◽  
Adsorption Desorption ◽  
Covalent Interactions

Optical characterisation using dye molecules as probes was used to study the non-covalent interactions between chemically converted graphene (CCG) and non-conjugated, water soluble polymers in aqueous solution. The strong adsorption of non-conjugated polymers such as poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA) on CCG is observed by fluorescence and ultraviolet-visible spectroscopy and atomic force microscopy, and this leads to desorption of π-conjugated molecules from CCG. Such adsorption/desorption behaviour can be tailored by modifying the molecular weight of polymers and the chemistry of graphene. This finding provides a facile and non-covalent approach to the functionalisation of CCG and opens up new opportunities for the fabrication of graphene/polymer nanocomposites.

Novel green method of preparation of a poly (ethylene oxide)/graphene nanocomposite using organic salt assisted dispersion

RSC Advances ◽  
2015 ◽  
Vol 5 (39) ◽  
pp. 30555-30563 ◽  
Author(s):  
Siddheshwar B. Jagtap ◽  
Ramakant K. Kushwaha ◽  
Debdatta Ratna
Keyword(s):  
Ethylene Oxide ◽  
Water Soluble ◽  
Organic Salt ◽  
Green Method ◽  
Environment Friendly ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Poly Ethylene Oxide ◽  
Graphene Nanocomposite ◽  
Poly Ethylene

Novel green method was developed to prepare nanocomposites of poly (ethylene oxide) (PEO) and graphene in water. This method is environment friendly with no health hazards and can be adapted to any other water soluble polymers.

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