Emulsion atom transfer radical block copolymerization of 2‐ethylhexyl methacrylate and methyl methacrylate

Eslami, Hormoz; Zhu, Shiping

doi:10.1002/pola.21297

Cited by 39 publications

(47 citation statements)

References 27 publications

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“…In the method, a temperature profile was used where polymerization was initially carried out at 30 C for 30 min, and then followed by 70 C for the further polymerization. In this way, well-controlled PEHMA homopolymers with M w /M n ¼ 1.1-1.2 216 and PEHMA-b-PMMA with M w / M n \ 1.2 217 were produced in coagulum-free stable latex particles with a diameter of $300 nm.…”

Section: Other Methodsmentioning

confidence: 99%

Recent advances in controlled/living radical polymerization in emulsion and dispersion

2008

J. Polym. Sci. A Polym. Chem.

142

126

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Effective ways to conduct controlled/living radical polymerization (CRP) in emulsion systems are necessary for commercial latex production without significant modification of current industrial facilities. Conducting CRP in emulsion media is more complicated and more challenging than its application in homogeneous bulk. These challenges come from the intrinsic kinetics of emulsion polymerization. They include mass transport, slow chain growth mechanism, and exit of short radicals from polymeric particles. This review describes the recent developments of CRP in heterogeneous dispersion, including miniemulsion, microemulsion, dispersion, and especially emulsion. Various approaches for conducting emulsion CRP are detailed, including controlled seeded emulsion polymerization, nanoprecipitation, use of short oligomers as macroinitiators for in situ block copolymerization, and RAFT-mediated selfassembly. In addition many remaining challenges of the current methods barring wide spread industrial application of emulsion CRP are also suggested.

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Section: Other Methodsmentioning

confidence: 99%

Recent advances in controlled/living radical polymerization in emulsion and dispersion

2008

J. Polym. Sci. A Polym. Chem.

142

126

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“…[9] The antioxidant, Irganox 1010 {tetrakis-[methylene-(3,5-di-t-butyl-4-hydrocinnamate)]methane; CIBA}, was used as received. P(MMA-EHMA-MMA) films for atomic force microscopy (AFM) measurements were prepared on silicon wafers.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous paper we described an emulsion atomtransfer radical block copolymerization of methyl methacrylate and 2-ethylhexyl methacrylate for the synthesis of triblock copolymers P(MMA-EHMA-MMA) as illustrated in Figure 1. [9] The resulting copolymer latex is a candidate for new binders and adhesives for specialpurpose applications such as medical tapes and labels where solvents are not tolerated. In this paper, we report the morphological and mechanical properties and the phase behaviors of these triblock copolymers.…”

Section: Introductionmentioning

confidence: 99%

Morphological and Physical Properties of Triblock Copolymers of Methyl Methacrylate and 2‐Ethylhexyl Methacrylate

Eslami

Zhu

2006

Macro Materials & Eng

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Summary: Triblock copolymers of methyl methacrylate (MMA) and 2‐ethylhexyl methacrylate (EHMA) [that is, poly(MMA–EHMA–MMA)] were prepared by an emulsion atom‐transfer radical polymerization. The relationships of their structural, morphological, and physical properties were investigated. The latex particles had core‐shell morphologies and the block copolymers experienced phase separation. Small latex particles with a low number of cores could deform and wet silicon‐wafer surfaces, but the deformation of large latex particles was restricted by the internal two‐phase morphology of the particles. Latex casting produced continuous pinhole‐free films, in which hard poly(MMA) (PMMA) cores of different latex particles merged and provided interparticle connections. The morphology of solution‐cast films depended on block composition, solvent type, and film thickness. For all the prepared polymer samples, thick films cast in toluene had poly(EHMA) (PEHMA) materials at air surface, whereas those cast in tetrahydrofuran had a sponge‐like PMMA surface structure. Thin toluene‐cast films from P(MMA–EHMA–MMA) with the block degrees of polymerization ($\overline {DP}$) 200–930–200 showed spherical PMMA domains and those from 380–930–380 yielded a protruded worm‐like PMMA structure. The copolymer materials were coated on a glass surface for peeling tests. The films gave good hot‐melt adhesion properties when the $\overline {DP}$ of the PEHMA block was over 600. The peeling strength depended on the lengths of both PEHMA and PMMA blocks. The P(MMA–EHMA–MMA) sample with $\overline {DP} {\rm s}$ of 310–930–310 yielded the highest peeling strength of 7.4 kgf · inch−1. The developed material is demonstrated to be a good candidate for a solvent‐free, hot‐melt, pressure‐sensitive adhesives for special‐purpose applications such as medical tapes and labels. magnified image

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“…Th e emulsion copolymerization of EHMA and MMA was carried out with the use of a bifunctional initiator 1,4-butylene glycol di(2-bromoisobutyrate) by Eslami and Zhu [87]. Th e eff ects of initiator concentration and temperature profi le on the polymerization kinetics and latex stability were examined.…”

Section: Initiatormentioning

confidence: 99%

Environmentally‐Friendly Acrylates‐Based Polymer Latices

Shukla¹,

Rai

2014

Advanced Materials for Agriculture, Food, and Environmental Safety

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Acrylic copolymers have achieved prime importance in various avenues of industrial application such as adhesive in packaging and construction, binder and stabilizer in textiles, base coat in leather, topcoat in fl oor polish, pigment binder in paper industries, etc. Acrylic resins are generally known to have superior exterior durability and weather resistance compared to other organic binders/fi lm-formers commonly used in surface coatings. Th e emulsion polymerization of acrylic monomers provides a good combination of performance properties required in fi lm formation. Th ese properties depend on the copolymer composition, particle size, molecular weight, glass transition temperature (Tg), morphology of the latex particles, etc.In this chapter, the reaction components and polymerization process conditions that aff ect the inherent characteristics of the polymers are presented. Th ere is a discussion of the incorporation of comonomer, which would lead to an improvement in the fl exibility of fi lms produced along with adhesion, gloss, hardness, solvent resistance, water resistance, etc. Also, there is a recently developed successful approach for achieving balanced properties which involves the copolymerization of fi lm-forming monomers like acrylate and methacrylates with crosslinkable monomers.

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Emulsion atom transfer radical block copolymerization of 2‐ethylhexyl methacrylate and methyl methacrylate

Cited by 39 publications

References 27 publications

Recent advances in controlled/living radical polymerization in emulsion and dispersion

Recent advances in controlled/living radical polymerization in emulsion and dispersion

Morphological and Physical Properties of Triblock Copolymers of Methyl Methacrylate and 2‐Ethylhexyl Methacrylate

Environmentally‐Friendly Acrylates‐Based Polymer Latices

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