Characterization of Molecular Structure of Emulsion Acrylic Microgels: Exploring the Impact of Molar Mass on Coating Properties of Self-Crosslinking Latexes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F16%3AN0000065" target="_blank" >RIV/28676092:_____/16:N0000065 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.tandfonline.com/doi/full/10.1080/03602559.2016.1185662" target="_blank" >http://www.tandfonline.com/doi/full/10.1080/03602559.2016.1185662</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/03602559.2016.1185662" target="_blank" >10.1080/03602559.2016.1185662</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization of Molecular Structure of Emulsion Acrylic Microgels: Exploring the Impact of Molar Mass on Coating Properties of Self-Crosslinking Latexes

Popis výsledku v původním jazyce

Self-crosslinking latexes of core-shell microgel particles were synthesized by the semi-continuous non-seeded emulsion polymerization of methyl methacrylate, butyl acrylate and methacrylic acid as main monomers. The particle core was slightly crosslinked using a constant amount of allyl methacrylate as a comonomer, to prevent the copolymers forming the core phase from migration into the shell phase. For interfacial crosslinking, diacetone acrylamide was copolymerized into the shell layer of latex particles to provide sites for subsequent reaction with adipic acid dihydrazide. The molar mass of copolymers forming the shell layer was gradually reduced by isooctyl 3-mercaptopropionate chain transfer agent included in the synthesis of each of the shell layers. The molar mass and molar mass distribution of structured latex particles was determined using the conventional SEC-MALS technique and the novel A4F-MALS method. Whereas SEC-MALS was found to be convenient for characterization of low molar mass shell copolymers without crosslinked structure, A4F-MALS was proved as a very efficient technique for characterization of high molar mass copolymers and core-shell microgels. The influence of molar mass of the shell layer of microgels on film-forming and final coating properties of self-crosslinking latexes was investigated as well. The results confirmed theoretical predictions and described empirically the effects of molar mass of the shell layer copolymer on decreasing the minimum film-forming temperature and influencing the end-use properties of coatings.

Název v anglickém jazyce

Characterization of Molecular Structure of Emulsion Acrylic Microgels: Exploring the Impact of Molar Mass on Coating Properties of Self-Crosslinking Latexes

Popis výsledku anglicky

Self-crosslinking latexes of core-shell microgel particles were synthesized by the semi-continuous non-seeded emulsion polymerization of methyl methacrylate, butyl acrylate and methacrylic acid as main monomers. The particle core was slightly crosslinked using a constant amount of allyl methacrylate as a comonomer, to prevent the copolymers forming the core phase from migration into the shell phase. For interfacial crosslinking, diacetone acrylamide was copolymerized into the shell layer of latex particles to provide sites for subsequent reaction with adipic acid dihydrazide. The molar mass of copolymers forming the shell layer was gradually reduced by isooctyl 3-mercaptopropionate chain transfer agent included in the synthesis of each of the shell layers. The molar mass and molar mass distribution of structured latex particles was determined using the conventional SEC-MALS technique and the novel A4F-MALS method. Whereas SEC-MALS was found to be convenient for characterization of low molar mass shell copolymers without crosslinked structure, A4F-MALS was proved as a very efficient technique for characterization of high molar mass copolymers and core-shell microgels. The influence of molar mass of the shell layer of microgels on film-forming and final coating properties of self-crosslinking latexes was investigated as well. The results confirmed theoretical predictions and described empirically the effects of molar mass of the shell layer copolymer on decreasing the minimum film-forming temperature and influencing the end-use properties of coatings.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název periodika

Polymer-Plastic Technology and Engineering

ISSN

0360-2559

e-ISSN

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Svazek periodika

2016

Číslo periodika v rámci svazku

2016

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

39

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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