Surfactants Mediate the Dewetting of Acrylic Polymer Films Commonly Applied to Works of Art

2019 ◽  
Vol 11 (30) ◽  
pp. 27288-27296 ◽  
Author(s):  
Costanza Montis ◽  
Kaloian Koynov ◽  
Andreas Best ◽  
Michele Baglioni ◽  
Hans-Jürgen Butt ◽  
...  
Keyword(s):  
Polymer Films ◽  
Acrylic Polymer ◽  
Works Of Art

scholarly journals Nonionic Surfactants for the Cleaning of Works of Art: Insights on Acrylic Polymer Films Dewetting and Artificial Soil Removal

2020 ◽  
Vol 12 (23) ◽  
pp. 26704-26716
Author(s):  
Michele Baglioni ◽  
Teresa Guaragnone ◽  
Rosangela Mastrangelo ◽  
Felipe Hidetomo Sekine ◽  
Taku Ogura ◽  
...  
Keyword(s):  
Polymer Films ◽  
Nonionic Surfactants ◽  
Soil Removal ◽  
Artificial Soil ◽  
Acrylic Polymer ◽  
Works Of Art

scholarly journals INVESTIGATION OF IMPACT OF CROSSLINKING AGENTS ON CHARACTERISTICS OF SPATIAL NET AND PROPERTIES OF STYRENE-ACRYLIC POLYMER FILMS

2018 ◽  
Vol 61 (7) ◽  
pp. 68
Author(s):  
Inna Slepchuk ◽  
Olga Ya. Semeshko ◽  
Tatiana S. Asaulyuk ◽  
Yuliya G. Saribekova
Keyword(s):  
Mechanical Properties ◽  
Polymer Film ◽  
Polymer Films ◽  
Crosslinking Agent ◽  
Hydrolytic Degradation ◽  
Physical And Mechanical Properties ◽  
Acrylic Polymer ◽  
The Individual ◽  
High Degree ◽  
Crosslinking Agents

The influence of crosslinking agents on the characteristics and properties of films from aqueous dispersions of styrene-acrylic polymers Lacritex 309, 430 and 640 was studied in order to obtain coatings on textile materials. Mono-, di- and triglycidyl esters are chosen as crosslinking agents. The choice of aqueous dispersions of polymers and crosslinkers is due to strict environmental requirements for textile products. By determining the amount of aceton-insoluble fractions of the formed polymer films, it was determined that the incorporation of crosslinkers is required in the Lacritex dispersion 640, and the films based on Lacritex 430 and 309 are distinguished by a high degree of intermolecular crosslinking. Optimum concentrations of crosslinkers have been established, which provide a high degree of curing of Lacritex 640. Using the sol-gel method, the structural parameters of the spatial nets of styrene-acrylic polymers (the part of sol fraction, the degree of crosslinking, the part of active chains, the average molecular weight of the chain segment, the crosslink density) were calculated. The polymer films from the individual polymer Lacritex 430 have the highest indexes of physic mechanical characteristics. Lacritex 640/Laproxide 703 compositions can be used as polymer matrixes for textile materials. The formation of crosslinks of hydroxyl and carboxyl groups of the styrene-acrylic polymer with epoxy groups of the crosslinking agent was confirmed by IR spectroscopy. The investigation of the effect of water and soap-soda treatments at various temperatures shows that the films under study have high resistance to water and soap-soda solution. The results of investigation of the tensile strength, the elongation at break, the hardness of the coating surface by the Koenig method and the stickiness according to the FINAT method (Test Method Number 9) of the formed polymer films indicate high physical and mechanical properties such as increased mechanical strength and elasticity, reduced hardness and tackiness. Thus, based on the studies carried out, it can be concluded that the individual styrene-acrylic Lacritex polymers 309 and 430 provide the formation of a strong three-dimensional spatial structure of the polymer film and can be used without crosslinking agents. The use of Lacritex 640 is possible in the composition together with the Laproxide 703 crosslinking agent at an optimum concentration of 4%. A polymer film based on this composition has a high degree of crosslinking, and as a result, increased resistance to organic solvents, reduced hydrolytic degradation at high temperatures, and increased physico-mechanical properties. A polymer film based on this composition has a high degree of crosslinking, hence, has increased resistance to organic solvents, reduced hydrolytic degradation at high temperatures, and increased physical and mechanical properties. Forcitation:Slepchuk I., Semeshko O.Ya., Asaulyuk T.S., Saribekova Yu.G. Investigation of impact of rosslinking agents on characteristics of spatial net and properties of styrene-acrylic polymer films. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 67-75

Dewetting acrylic polymer films with water/propylene carbonate/surfactant mixtures – implications for cultural heritage conservation

2017 ◽  
Vol 19 (35) ◽  
pp. 23723-23732 ◽  
Author(s):  
M. Baglioni ◽  
C. Montis ◽  
F. Brandi ◽  
T. Guaragnone ◽  
I. Meazzini ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Propylene Carbonate ◽  
Polymer Films ◽  
Interfacial Energy ◽  
Heritage Conservation ◽  
Surfactant Mixtures ◽  
Acrylic Polymer ◽  
Cultural Heritage Conservation

The surfactant lowers the interfacial energy between the phases, favoring polymer dewetting.

The Molecular Interactions That Influence the Plasticizer Dependent Dissolution of Acrylic Polymer Films

2008 ◽  
Vol 97 (9) ◽  
pp. 3957-3971 ◽  
Author(s):  
Hala M. Fadda ◽  
María C. Hernández ◽  
Daniel N. Margetson ◽  
S. Mark McAllister ◽  
Abdul W. Basit ◽  
...  
Keyword(s):  
Molecular Interactions ◽  
Polymer Films ◽  
Acrylic Polymer

scholarly journals INVESTIGATION OF PHYSICOCHEMICAL PROPERTIES OF STYRENE-ACRYLIC AND URETHANE POLYMERS USED IN FINISHING OF TEXTILE MATERIALS

2020 ◽  
Vol 63 (3) ◽  
pp. 88-93
Author(s):  
Inna Slepchuk ◽  
Olga Ya. Semeshko ◽  
Tatyana S. Asaulyuk ◽  
Yuliya G. Saribyekova
Keyword(s):  
Physicochemical Properties ◽  
Cotton Fabric ◽  
Polymer Films ◽  
Tensile Load ◽  
Polymer Coatings ◽  
Breaking Load ◽  
Textile Material ◽  
Acrylic Polymer ◽  
Textile Materials ◽  
Crosslinking Agents

The results of the study of the physicochemical properties of styrene-acrylic and urethane polymer films, as well as polymer compositions based on the studied polymers with the addition of crosslinking agents are presented. Aqueous dispersions of styrene-acrylic polymers Lacritex 309, Lacritex 430, Lacritex 640 and polyurethane polymer Aquapol 14 were used for the formation of films. Triglycidyl esthers of polyoxypropylene triol and trimethylolpropane — Laproxid 703 and Laproxid TMP — were used as crosslinking agents. The stability of polymer films to hydrolytic destruction was evaluated after treatment at 20, 40 and 100 °C, and to the soap-soda treatment — at 40 °C. It was found that the most resistant to hydrolysis and soap-soda treatment are films from styrene-acrylic polymer Lacritex 309 and compositions Lacritex 640 / Laproxid 703, Aquapol 14 / Laproxid TMP, Aquapol 14 / Laproxid 703. The tensile load, elongation at break, stiffness and surface tackiness were also determined for the studied polymer films. It was found that polymer films based on Lacritex 309 and compositions Lacritex 640 / Laproxid 703, Aquapol 14 / Laproxid 703 are characterized by the greatest strength and elongation, non-rigid and non-tacky surface. Adding Laproxid TMP to polyurethane Aquapol 14 provides creation of a solid and inelastic film. To assess the effect of polymer coatings on the textile material rigidity, a cotton fabric with twill weave was used, which is used for special work clothes. Polymers and their compositions were applied to the fabric from a solution with a concentration of 150 g/l, followed by drying and heat setting. For dressed cotton fabric, rigidity and breaking load were determined. The rigidity of the treated cotton fabric was determined by the method of console. It has been established that the use of polyurethane Aquapol 14 and compositions based on it, as well as styrene-acrylic dispersions Lacritex 309 and Lacritex 430 will result in hard handle of textile materials. The composition based on Lacritex 640 with the addition of Laproxid 703 as a crosslinker provides an elastic and strong textile material.

Influence of selected surfactants on the tackiness of acrylic polymer films

2004 ◽  
Vol 287 (1-2) ◽  
pp. 27-37 ◽  
Author(s):  
Sathaporn Nimkulrat ◽  
Krisda Suchiva ◽  
Pranee Phinyocheep ◽  
Satit Puttipipatkhachorn
Keyword(s):  
Polymer Films ◽  
Acrylic Polymer

Gum arabic helps prepare better lacey polymer films for specimen support in electron microscopy

1993 ◽  
Vol 51 ◽  
pp. 240-241
Author(s):  
Shailesh R. Sheth ◽  
Jayesh R. Bellare
Keyword(s):  
Electron Microscopy ◽  
Polymer Films ◽  
Gum Arabic ◽  
Complete Removal ◽  
Ammonium Bromide ◽  
Release Agent ◽  
Astigmatism Correction ◽  
Long Time ◽  
Micro Holes ◽  
Cetyl Trimethyl Ammonium

Specimen support and astigmatism correction in Electron Microscopy are at least two areas in which lacey polymer films find extensive applications. Although their preparation has been studied for a very long time, present techniques still suffer from incomplete release of the film from its substrate and presence of a large number of pseudo holes in the film. Our method ensures complete removal of the entire lacey film from the substrate and fewer pseudo holes by pre-treating the substrate with Gum Arabic, which acts as a film release agent.The method is based on the classical condensation technique for preparing lacey films which is essentially deposition of minute water or ice droplets on the substrate and laying the polymer film over it, so that micro holes are formed corresponding to the droplets. A microscope glass slide (the substrate) is immersed in 2.0% (w/v) aq. CTAB (cetyl trimethyl ammonium bromide)-0.22% (w/v) aq.

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