Preparation and characterization of polysiloxane-poly(butyl acrylate–styrene) composite latices and their film properties

Zou, Mingxuan; Wang, Shijie; Zhang, Zhicheng; Ge, Xinlei

doi:10.1016/j.eurpolymj.2005.05.038

Cited by 53 publications

(22 citation statements)

References 23 publications

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“…Polysiloxane acrylic hybrid latexes have several advantages since they combine dissimilar properties of each material in one material [3]. These latexes bear superior advantages of polysiloxane and acrylic polymers.…”

Section: Introductionmentioning

confidence: 99%

Optimization and comparison of polysiloxane acrylic hybrid latex synthesis methods

Bas

Soucek

2012

J Polym Res

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Two methods were used to prepare polysiloxanefunctionalized acrylic latexes via emulsion polymerization. Ethyl acrylate and 2-ethylhexyl acrylate were used in both methods as acrylic phase. In the first method, an acrylic core was prepared with addition of a coupling agent, 3-(trimethoxysilyl) propyl methacrylate, after which cyclic siloxane monomer (octamethylcyclotetrasiloxane) was reacted with the coupling agent. In the second method, a silaneterminated polysiloxane (H-PDMS) was reacted with ethylene glycol dimethacrylate, and then copolymerized with ethyl acrylate and 2-ethylhexyl acrylate in a batch emulsion polymerization. Particle size distribution and particle morphology were evaluated by using dynamic light scattering (DLS) and transmission electron microscopy (TEM), respectively. Core-shell morphology was observed in TEM for the first preparation method as proposed. After film formation, surface tension, morphology and dynamic mechanical properties were investigated. Stratification of polysiloxane was examined by Fourier-transform infrared spectroscopy (FT-IR) and energy dispersive X-ray (EDX). Energy dispersive X-ray data indicated that only the second preparation method had higher silicon content at film-air interface than film-substrate interface. In both methods, storage modulus and surface energy of latex films decreased after grafting polysiloxane.

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Section: Introductionmentioning

confidence: 99%

Optimization and comparison of polysiloxane acrylic hybrid latex synthesis methods

Bas

Soucek

2012

J Polym Res

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“…In addition, the spectra of S4 in the range 990–1136 cm −1 were broader compared to S1 and S3 because of SiOSi and SiOC asymmetric stretching. Coupled with the high content of EG in the poly(silicone‐ co ‐acrylate) emulsions, all of the previous results provided evidence for the copolymerization of VTES onto the polyacrylate chain …”

Section: Resultsmentioning

confidence: 99%

Aqueous polyacrylate/poly(silicone‐co‐acrylate) emulsion coated fertilizers for slow nutrient‐release application

Shen

Zhang

2014

J of Applied Polymer Sci

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Waterborne polyacrylate/poly(silicone-co-acrylate) emulsions were synthesized to develop coated fertilizers. The effects of the n-butyl acrylate (BA)/methyl methacrylate (MMA) ratio, vinyltriethoxysilane, and synthesis method on the water resistance, glasstransition temperature, mechanical properties, and nutrient-release profiles were investigated. The results show that miniemulsion polymerization with a BA/MMA ratio of 55:45 was the most suitable for slow nutrient-release applications. Under these conditions, the preliminary solubility rate of the nutrient was about 3%, and the 30-day cumulative nutrient release was 15% at 25

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“…and 1006 cm -1 [30][31][32][33][34][35]. Additionally, the δ S-C band at 894 cm -1 was likely overlapped by the V CF3…”

Section: Elastomers With Fluorosilicone Chemistry (Fsr)mentioning

confidence: 91%

Degradation of different elastomeric polymers in simulated geothermal environments at 300 °C

Sugama

Pyatina

Redline

et al. 2015

Polymer Degradation and Stability

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This study evaluates the degradation of six different elastomeric polymers used for O-rings: EPDM, FEPM, type I-and II-FKM, FFKM, and FSR, in five different simulated geothermal environments at 300°C: 1) non-aerated steam/cooling cycles, 2) aerated steam/cooling cycles, 3)water-based drilling fluid, 4) CO 2 -rich geo-brine fluid, and, 5) heat-cool water quenching cycles.The factors assessed included the extent of oxidation, changes in thermal behavior, microdefects, permeation of ionic species from the test environments into the O-rings, silicate-related scale-deposition, and changes in the O-rings' inverse tensile compliance.The reliability of the O-ring to maintain its integrity depended on the elastomeric polymer composition and the exposure environment. FSR disintegrated while EPDM was oxidized only to some degree in all the environments, FKM withstood heat-water quenching but underwent chemical degradation, FEPM survived in all the environments with the exception of heat-water quenching where it underwent severe oxidation-induced degradation, and FFKM displayed outstanding compatibility with all the tested environments. The paper discusses the degradation mechanisms of the polymers under the aforementioned conditions.

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Preparation and characterization of polysiloxane-poly(butyl acrylate–styrene) composite latices and their film properties

Cited by 53 publications

References 23 publications

Optimization and comparison of polysiloxane acrylic hybrid latex synthesis methods

Optimization and comparison of polysiloxane acrylic hybrid latex synthesis methods

Aqueous polyacrylate/poly(silicone‐co‐acrylate) emulsion coated fertilizers for slow nutrient‐release application

Degradation of different elastomeric polymers in simulated geothermal environments at 300 °C

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