Humid aging of polyetherimide. I. Water sorption characteristics

Merdas, I.; Thominette, F.; Verdú, J.

doi:10.1002/1097-4628(20000815)77:7<1439::aid-app5>3.0.co;2-f

Cited by 40 publications

(37 citation statements)

References 16 publications

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“…In addition, these groups may hinder the order of interaction in polymer and lead to the amorphous and structureless morphological structure in PEI. [4][5][6] The high concentration of polar groups and poor morphological structure in PEI induced to relatively high water sorption. The water sorption causes the potential reliability problems in microelectronic devices, 1-3,5-10 such as displacement, package crack, delamination, loss of adhesion, potential corrosion, and mechanical failures in thin films.…”

Section: Introductionmentioning

confidence: 99%

Thermal, optical, and water sorption properties in composite films of poly(ether imide) and bismaleimides: Effect of chemical structure

Seo

Jang

Han

2009

J of Applied Polymer Sci

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Two series of semi-interpenetrating polymer network (semi-IPN) composite films, PEI/bismaleimide (UTBM) and PEI/fluorinated BMI (UTFBM) were prepared using a thermoplastic PEI and two different crosslinkable imide moieties. The effects of chemical structure and content of crosslinkable imide moieties on thermal stability, dielectric properties, and water sorption have been investigated. Glass transition temperature and weight loss temperatures increased with increase in the content of crosslinkable imide moieties, indicating the enhanced thermal stability of the semi-IPN composite films. The refractive indices of the semi-IPN composite systems increased with increasing crosslinkable imide moieties due to the higher polarizabilities of atoms. The water sorption of the semi-IPN composite films was significantly decreased by the incorporation of crosslinkable imide moieties, which are interpreted by morphological structure.

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Section: Introductionmentioning

confidence: 99%

Thermal, optical, and water sorption properties in composite films of poly(ether imide) and bismaleimides: Effect of chemical structure

Seo

Jang

Han

2009

J of Applied Polymer Sci

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“…CE/EP‐15PI showed moisture absorption of 1.7% at equilibrium in boiling water, larger than the value of 1.3% for CE/EP. Polyimide generally has a high affinity for water with an equilibrium water uptake up to 6% due to its polar structure, which may cause plasticization, hydrolysis, and swelling of the resin . Therefore, the tradeoff between thermal stability and moisture adsorption requires further research effort for the optimization of the copolymer blends system.…”

Section: Resultsmentioning

confidence: 99%

Polyimide incorporated cyanate ester/epoxy copolymers for high‐temperature molding compounds

Song

Hah

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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The rapid development of high‐power devices has driven the requirement for high‐temperature stable epoxy molding compounds. In this work, a designed polymer blend system consisting of cyanate ester/epoxy copolymers modified by polyimide (CE/EP‐PI) has been studied. Polyimide used in this study has shown excellent dispersity in the cyanate ester and epoxy copolymer network (CE/EP), exhibiting homogeneous phase with a denser polymer network structure. With this polymer blend structure, CE/EP‐PI system was proved to have a glass transition temperature as high as ~270 °C, increased modulus, and largely enhanced fracture toughness up to 2.06 MPa m1/2. CE/EP‐PI resins showed outstanding long‐term stability at high temperature with low mass loss and increased fracture toughness after aging at 200 °C. This work provides a novel insight into the development of molding compounds based on polymer blends system with excellent high‐temperature properties. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 2412–2421

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“…Aromatic polyimides from conventional dianhydrides and diamines do not exhibit water uptake higher than 3-3.5% in any case. [24,25] Consequently, the combination of good mechanical and thermal properties and the values of water uptake qualify these polyimides as suitable candidates for proton exchange membrane fuel cells (PEMFCs). The proton conductivity and fuel cell performance of these new copolymers as proton exchange membranes will be the subject of a forthcoming article.…”

Section: Polymer Characterisation and Propertiesmentioning

confidence: 99%

Synthesis and Properties of Novel Polyimides Bearing Sulfonated Benzimidazole Pendant Groups

Álvarez-Gallego

Nunes

Lozano

et al. 2007

Macromol. Rapid Commun.

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A new diamine monomer containing benzimidazole‐5‐sulfonic acid has been synthesised. It has been reacted, alone or mixed with diaminodiphenyl ether, with naphthalenic dianhydride to attain polynaphthalimides in which the sulfonic acid functionality is borne by pendant benzimidazole groups. The presence of sulfonic and benzimidazole groups greatly affected the physical properties of the polyimides as the novel polymers were found to be soluble in polar organic solvents and exhibited a lower thermal resistance than their non‐sulfonated counterparts. The polymer films exhibited good mechanical properties with tensile strength in the range 100–120 MPa and with moduli in the range 2.2–3.1 GPa. Sulfonic and benzimidazole groups significantly enhanced the hydrophilicity of the copolyimides, which showed water uptake up to 39%.magnified image

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Humid aging of polyetherimide. I. Water sorption characteristics

Cited by 40 publications

References 16 publications

Thermal, optical, and water sorption properties in composite films of poly(ether imide) and bismaleimides: Effect of chemical structure

Thermal, optical, and water sorption properties in composite films of poly(ether imide) and bismaleimides: Effect of chemical structure

Polyimide incorporated cyanate ester/epoxy copolymers for high‐temperature molding compounds

Synthesis and Properties of Novel Polyimides Bearing Sulfonated Benzimidazole Pendant Groups

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