Electron beam curing of acrylic oligomers

Seto, Jun’etsu; Nagai, Tohru; Noguchi, Toshihiko; Arakawa, Seiichi; Shibata, Akihiro; Ishimoto, Coe; Miyashita, Mayumi

doi:10.1016/0146-5724(85)90136-0

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…For example, abrasive resistant coating for paper, plastic film, and steel, l2 adhesive for metallized paper, l3 magnetic media, 14,15 and silicone release paper and film have been already manufactured on a commercial basis.…”

Section: Introductionmentioning

confidence: 99%

Polymeric reaction of polymer–monomer system irradiated by low‐energy electron beam. IV. Adhesive properties of pressure sensitive adhesive

Takiguchi

Uryu

1990

J of Applied Polymer Sci

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SynopsisElectron beam (EB) preparation and properties of pressure sensitive adhesives were investigated. The pressure-sensitive adhesive was obtained by EB irradiation of a mixture of poly (butyl acrylate) (PBA) modified by acryloyl groups and 2-[ 2-hydroxy-3-phenoxy-propoxy]ethyl acrylate (HPPA).For the polymer with molecular weight (&fw) of 10 X l o ' , the introduction of two acryloyl groups per polymer molecule had the highest peel and dead load strength. On the other hand, for the polymer with Mu of 3 X l o ' , five acryloyl groups per polymer gave highest adhesive properties.This difference might be attributed to the entanglement of polymers with high molecular weights. Furthermore, the effect of the addition of polar monomers to the monomer mixture was investigated. Polar groups, such as hydroxyl and carboxyl groups, increased the adhesive properties. INTRODUCTIONSince a low energy electron beam accelerator can be conveniently used in a laboratory, many investigations on its applications have appeared in the field of the EB polymerization. There were some investigations of mechanical properties and morphology of EB cured poly (urethane acrylate) for a Several investigations have been published on the reaction behavior of poly (vinyl chloride) -methacrylate monomer system for crosslinking of wireWe also reported the reaction behavior of polymer-monomer systems.lOJ1There are many applications which have been commercialized, or are on the verge of industrialization. For example, abrasive resistant coating for paper, plastic film, and steel, l2 adhesive for metallized paper, l3 magnetic media, 14,15 and silicone release paper and film have been already manufactured on a commercial basis.However, EB cured pressure-sensitive adhesives have not been commercialized in spite of the severalThe major reason seems to be that in production of pressure-sensitive adhesives, advantages of EB cure over ultraviolet (UV) and thermal cures have not been found. Thus, in order to identify the advantages of pressure-sensitive adhesives by EB irradiation, we have studied the relationship between the adhesive properties and the reaction behavior of EB curing for one polymer-monomer system.lg It has been revealed that M/ (x 10' ) P-1 P-2 P-3 P-4 P-5 P-6 P-7 P-8 P- grafting and moderate crosslinking reactions caused by EB irradiation contribute to improved adhesive properties. It has also been shown that an increase in the molecular weight of the polymer increases the adhesion. In the conventional (thermal cure) pressure-sensitive adhesive, it has been also shown that high-molecular-weight polymers provide high peel and cohesive strength.20*21The manufacturing process of EB cured pressure-sensitive adhesives must be designed so that a high molecular weight polymer mixture is obtained by starting from a low-molecular-weight polymer system, since low viscosity is required to coat films with the pressure-sensitive adhesive solution.In this paper, we wish to report the synthesis of adhesives consisting of poly(buty1 acrylate) (PBA) mo...

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Section: Introductionmentioning

confidence: 99%

Polymeric reaction of polymer–monomer system irradiated by low‐energy electron beam. IV. Adhesive properties of pressure sensitive adhesive

Takiguchi

Uryu

1990

J of Applied Polymer Sci

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“…Durante a polimerização de monômeros multifuncionais como em nosso caso, a resina inicialmente líquida será transformada em um polímero sólido com muitas ligações cruzadas fazendo-o insolúvel. Um dos métodos mais simples de avaliar a extensão da cura consiste em medir a quantidade de material insolúvel formado em uma amostra depois de um tempo determinado de iniciada a reação [SIGlA, 1954], [SETO, 1985]. Por tratamento de uma amostra com um solvente orgânico, geralmente acetona, é possível separar a fração solúvel (sol) da insolúvel (gel), e determinar a relação entre ambas.…”

Section: 31-gravimetriaunclassified

Desenvolvimento e estudo cinetico de sistemas polimericos para utilização na industria de dispositivos opticos

Leon¹,

Bittencourt²

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Foram muitas as pessoas que de forma direta ou indireta fizeram possível a realização deste trabalho. Primeiramente quero agradecer a este país, Brasil, que me acolheu como um filho nos últimos três anos, e espero que seja por muitos mais. À UNICAMP e em particular ao DTP que me deram a possibilidade de ser um de seus estudantes. A FAPESP pelo apoio financeiro.Aos professores e alunos do DTP, por sua paciência e ajuda, ao professor Edison Bittencourt, meu orientador, ao Fabio, ao Alexandre, à Clara, à Zaida, e ao José Luis pelo apoio e amizade brindada.Aos cubanos de Campinas: Raúl, Annabell, Luisma, Marta, Eduardo, Sahudy, Ania, Odalys e Oby que fizeram mais simples minha adaptação a uma nova vida fora de meu país.Aos amigos cubanos de longe: Santiago (Alemanha), José Carlos e Melvin (Espanha), sem eles teria sido impossível chegar aqui.À minha família, que sempre esteve presente e estimulou-me, especialmente meu pai e minha mãe, a eles agradeço a oportunidade de existir, agradeço a educação que me deram e a todo o sacrifício que já fizeram para que hoje eu estivesse aqui. E a Juan Carlos e Daynet, acho que não deveria chamar de meus segundos pais porque têm minha idade e provavelmente não gostarão, talvez poderia chamá-los irmãos, mas sem dúvida o mais corretos seria amigos, desses amigos que sempre estarão presentes, sem importar o que possa acontecer no futuro.Agradeço a toda a família de Stela: pais, irmãs, sobrinhos e todos os outros que me acolheram, fazendo mais fácil viver com a ausência de minha família.E não por ser a ultima deixa de ser importante, agradeço a Stela, por seu apoio, ajuda, carinho e por estar sempre presente nos dois últimos anos, espero que este sempre junto a mim.

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An NMR study of the electron beam‐induced polymerization of trimethylolpropane triacrylate and trimethylolpropane trimethacrylate

Harrell¹,

Choudhury²,

Ahuja³

et al. 1991

J Polym Sci B Polym Phys

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Electron beam‐induced polymerization of trimethylolpropane triacrylate (TMPTA) and its methacrylate analog (TMPTMA) was studied using nuclear magnetic resonance (NMR) relaxation time measurements. Free induction decays (FID) of partially polymerized samples consist of a short Gaussian component and a longer component comprised of a distribution of simple exponentials. The relative intensity of the Gaussian component increases with radiation dose. T1 and T1ρ values were measured as a function of temperature and radiation dose. The relaxation is due primarily to methyl group reorientation at low temperatures, ethyl group reorientation at intermediate temperatures, and whole‐molecule reorientation at high temperatures. In both compounds, the T1 and T1ρ values at the high temperature minima increase with increasing dose, and the minima values can be used to estimate the degree of polymerization. The temperature at which the T1ρ minimum occurs increases with dose, suggesting an increase in the glass transition temperature, Tg, with polymerization. The polymerization appears to have very little effect on the low temperature CH3 reorientation in TMPTA. In TMPTMA the polymerization appears to reduce the mobility of the methacrylate methyl groups.

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Electron beam curing of acrylic oligomers

Cited by 10 publications

References 8 publications

Polymeric reaction of polymer–monomer system irradiated by low‐energy electron beam. IV. Adhesive properties of pressure sensitive adhesive

Polymeric reaction of polymer–monomer system irradiated by low‐energy electron beam. IV. Adhesive properties of pressure sensitive adhesive

Desenvolvimento e estudo cinetico de sistemas polimericos para utilização na industria de dispositivos opticos

An NMR study of the electron beam‐induced polymerization of trimethylolpropane triacrylate and trimethylolpropane trimethacrylate

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