Preparation of poly(1,4-cyclohexylenedimethylene phthalate)s and their use as modifiers for aromatic diamine-cured epoxy resin

Iijima, T.; Hamakawa, Shuichi; Tomoi, Masao

doi:10.1002/1097-0126(200008)49:8<871::aid-pi473>3.0.co;2-o

Cited by 11 publications

(5 citation statements)

References 27 publications

(39 reference statements)

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“…The relation between modification behavior and morphology in the PEPT modification was complicated compared with that in the PEP modification. It is thought that most suitable morphology may be a particulate structure, considering the present PEP modification and the previous results 25–27, 31. When using 20 wt % low MW (6600) PEPT, the modified resin had the particulate structure (Figure 6a) and the K IC value increased 110% with no deterioration of flexural properties (Table II, no.…”

Section: Discussionsupporting

confidence: 63%

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Toughening of cycloaliphatic epoxy resins by poly(ethylene phthalate) and related copolyesters

Iijima

Fujimoto

Tomoi

2002

J of Applied Polymer Sci

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Poly(ethylene phthalate) (PEP) and poly(ethylene phthalate-co-ethylene terephthalate) were used to improve the brittleness of the cycloaliphatic epoxy resin 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexane carboxylate (Celoxide 2021™), cured with methyl hexahydrophthalic anhydride. The aromatic polyesters used were soluble in the epoxy resin without solvents and effective as modifiers for toughening the cured epoxy resin. For example, the inclusion of 20 wt % PEP (MW, 7400) led to a 130% increase in the fracture toughness (K IC ) of the cured resin with no loss of mechanical and thermal properties. The toughening mechanism is discussed in terms of the morphological and dynamic viscoelastic behaviors of the modified epoxy resin system.

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Section: Discussionsupporting

confidence: 63%

“…Recently, we prepared poly(1,4‐cyclohexanedimethylene phthalate) and used as a modifier for the DDS‐cured DGEBA resin: the toughening could also be achieved because of the particulate structure of the modified resin 31. The cocontinuous phase or phase‐inverted structures have not been observed at all in the previous studies 25–27, 31…”

Section: Discussionmentioning

confidence: 98%

Toughening of cycloaliphatic epoxy resins by poly(ethylene phthalate) and related copolyesters

Iijima

Fujimoto

Tomoi

2002

J of Applied Polymer Sci

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“…In the modification of epoxies with PEP or PBP, toughening is achieved with no loss of mechanical properties and a slight decrease in the glass transition temperature ( T g ) because of the particulate structure of the modified resins. Recently, poly(1,4‐cyclohexanedimethylene phthalate) (PCP) was prepared and used for highly crosslinked epoxies 30. The T g values for the PCP‐modified resins were comparable to that for the unmodified cured resin, while efficiency as a modifier of PCP was slightly less than that of PEP and related (co)polyesters.…”

Section: Introductionmentioning

confidence: 99%

Preparation of novel soluble poly(ester imide)s containing a trimellitimide moiety and their use as modifiers for aromatic diamine‐cured epoxy resin

Iijima¹,

Hamakawa²,

Tomoi³

2001

Polymer International

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Poly(ester imide)s, prepared by the reaction of phthalic anhydride, N-(4-carboxyphenyl) trimellitimide and 1,2-ethanediol, were used to improve the toughness of bisphenol-A diglycidyl ether epoxy resin cured with 4,4'-diaminodiphenyl sulfone (DDS). The poly(ester imide)s include poly(ethylene phthalate-co-ethylene N-(1,4-phenylene) trimellitimide dicarboxylate)s (PESIs) having 10, 20 and 30 mol% trimellitimide (TI) units, respectively. PESIs having 10 and 20 mol% TI units were effective as modi®ers for toughening the cured epoxy resin. For example, the inclusion of 20 wt% of PESI (20 mol% TI unit, M W 19300 g mol À1 ) led to a 55% increase in the fracture toughness (K IC ) of the cured resin (with an increase in¯exural strength and modulus) and the modi®ed resin had a particulate morphology. PESI having 30 mol% TI units was not effective because of degradation of the modi®er by DDS. The toughening mechanism is discussed in terms of morphological and dynamic viscoelastic behaviour of the modi®ed epoxy resin system.

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“…In particular, phthalic anhydride, isophthalic acid, terephthalic acid and 2,6-naphthalene dicarboxylic acid, and mixtures of these compounds are used. 98 Other flexibility enhancers are polyamide, polyetherimides, 66, 67 carboxylated polymers, 69 phenolic hydroxy-terminated polysulfones, 70 and fatty diamines. 50 The inclusion of 20% poly(ethylene phthalate) increases the fracture toughness of a cured resin by 130% with no loss of mechanical and thermal properties.…”

Section: Polycondensatesmentioning

confidence: 99%

Epoxy Resins

Fink

2005

Reactive Polymers Fundamentals and Applications

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Preparation of poly(1,4-cyclohexylenedimethylene phthalate)s and their use as modifiers for aromatic diamine-cured epoxy resin

Cited by 11 publications

References 27 publications

Toughening of cycloaliphatic epoxy resins by poly(ethylene phthalate) and related copolyesters

Toughening of cycloaliphatic epoxy resins by poly(ethylene phthalate) and related copolyesters

Preparation of novel soluble poly(ester imide)s containing a trimellitimide moiety and their use as modifiers for aromatic diamine‐cured epoxy resin

Epoxy Resins

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