Surface and morphological characterization of polysiloxane‐block‐polyimides

Furukawa, Nobuyuki; Yamada, Yasuharu; Furukawa, Masaya; Yuasa, Masatoshi; Kimura, Yoshiharu

doi:10.1002/(sici)1099-0518(199708)35:11<2239::aid-pola14>3.3.co;2-y

Cited by 18 publications

(28 citation statements)

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“…This means the extension of the sol-gel process from the area of ceramics to the field of rubber and also a new toughening method for polymers. It shows a similar physical property to the existing segmented polyimide-PDMS block copolymer 35,36 because of similar structures. However, the composite material that was made by the sol-gel process does not need to synthesize PDMS with expensive functional groups and is easier to produce.…”

Section: Introductionmentioning

confidence: 71%

Mechanical, surface, and thermal properties of polyamideimide–polydimethylsiloxane nanocomposites fabricated by sol–gel process

Park

Lee

Kim

2003

J of Applied Polymer Sci

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ABSTRACT:Polyamideimide (PAI)-epoxysilane (coupling agent) composites were reacted with oligomeric polydimethylsiloxane (PDMS), a condensation product of difunctional silane, by using the sol-gel process, and were then dried into films. After this procedure, the surface, mechanical, and thermal properties were measured. The study showed that PDMS existed in the PAI matrix by the use of FTIR. With respect to mechanical properties, the maximum elongation and toughness were increased in the PAI with silane groups, although the maximum tensile strength was slightly decreased. In this experiment, PAI-30 wt % epoxysilane composite had the best mechanical properties. The intensive dispersion of the silane groups on the surface of PAI was confirmed through XPS measurement. As a function of the siloxane contents, the TGA curve shows less thermal stability in terms of their initial weight loss. However, in an oxygen atmosphere at about 700°C, the series of PAI-siloxane composites indicated a significant increase in char concentration. In the end, PAI with a relevant amount of silane groups was improved in both toughness and surface properties. This experiment showed that PDMS added to PAI had better properties than those of classical materials.

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Section: Introductionmentioning

confidence: 71%

Mechanical, surface, and thermal properties of polyamideimide–polydimethylsiloxane nanocomposites fabricated by sol–gel process

Park

Lee

Kim

2003

J of Applied Polymer Sci

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“…The scanning electron micrographs of the block copolymers revealed that most of the surface of the synthesized copolymers was covered by the siloxane segment and microphase separation could hardly be detected. It has been reported that, in siloxane‐based copolymers with higher siloxane content, the siloxane domains become a dominant part of the polymer surface . The micrographs of selected samples (FcBC‐6 and TBC‐6) are presented in Figs (a) and (b).…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that, in siloxanebased copolymers with higher siloxane content, the siloxane domains become a dominant part of the polymer surface. 78 The micrographs of selected samples (FcBC-6 and TBC-6) are presented in Figs 5(a) and 5(b). The AFM images of the copolymers (Fig.…”

Section: Surface Morphologymentioning

confidence: 99%

Study on the preparation and properties of novel block copolymeric materials based on structurally modified organometallic as well as organic polyamides and polydimethylsiloxane

Khan

Akhter

Naz

et al. 2012

Polymer International

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Some novel ferrocene‐containing polyamide‐based block copolymer materials with telechelic polydimethylsiloxane oligomer and their organic analogues were prepared by solution‐phase polycondensation of ferrocene‐based organometallic and terephthaloyl‐ as well as isophthaloyl‐based organic acyl chlorides with a series of semi‐aromatic diamines having ether linkages together with variable aliphatic character. The corresponding polyamides of the synthesized materials, without polydimethylsiloxane segment, were also prepared for comparison of physicochemical properties. None of the synthesized organometallic and organic block copolymers along with their respective polyamides melted below 300 °C and their structural features were confirmed by their physical properties and spectroscopic studies. The weight‐average molecular weights and molecular parameters of all these materials were determined by the static laser light scattering technique. The materials were soluble in sulfuric acid and partially soluble in common organic solvents, and yet became readily soluble upon N‐trifluoroacetylation. The synthesized materials were further characterized by their water absorption characteristics, X‐ray diffraction studies and surface morphology (SEM and AFM) and thermal (DSC and TG) analyses, and their structure–property relationships were elucidated from these studies. The energies of pyrolysis for these materials were calculated by the Horowitz and Metzger method. © 2012 Society of Chemical Industry

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“…The surface tension (γ s ) and its polar (γ p ) and dispersive (γ d ) components were calculated by Young's equation (eq 3) and Fowke's equation (eq 4) (with water, diiodomethane, and hexadecane). The polar component of the surface tension according to previous investigations on PI–PSX copolymers37 increases with the content of the polar imide moiety from 2.7 to 12.9 mN/m. In contrast, the dispersive component remains constant around 26 mN/m (Table IV): where γ s , γ l , γ sl , θ, γ, γ d , and γ p are the surface tensions of solid and liquid, surface tension between solid and liquid, contact angle, total surface tension, and dispersion and polar surface components, respectively.…”

Section: Resultsmentioning

confidence: 62%

Novel synthesis of polyimide–polyhybridsiloxane block copolymers via polyhydrosilylation: Characterization and physical properties

André

Guida‐Pietrasanta

Rousseau

et al. 2001

J. Polym. Sci. A Polym. Chem.

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The insertion of soft polysiloxane segments into a polyimide backbone introduces changes in its properties (processability, low surface tension, gas permeability, and lower dielectric constant). Generally, these polyimide–polysiloxane copolymers are synthesized by the condensation of a dianhydride with an aromatic diamine and an amine telechelic polysiloxane, or by transimidization between an aminopyridine‐terminated oligoimide and an amine end‐capped oligosiloxane. This study investigated another route to obtain perfectly alternating polyimide–polyhybridsiloxane (PI–PHSX) block copolymers. The hydrosilylation, widely studied previously, was performed to elaborate copolymers from an allyl telechelic polyimide and a hydrosilane telechelic polyhybridsiloxane. The use of a telechelic polyhybridsiloxane as a soft segment brought better thermostability and better chemical resistance in comparison with an oligosiloxane based on Si(CH3)2O units. Using the same allyl telechelic polyimide moiety but varying the size of the hybrid siloxane part, we obtained different PI–PHSX block copolymers, leading to thermoplastic elastomers (TPE). We investigated the effect of the soft‐segment length on the thermal resistance, activation energy of thermal degradation, mechanical behavior, and surface properties of a series three PI–PHSX block copolymers containing 36, 54, and 75 wt % polyimide. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 2414–2425, 2001

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Surface and morphological characterization of polysiloxane‐block‐polyimides

Cited by 18 publications

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Mechanical, surface, and thermal properties of polyamideimide–polydimethylsiloxane nanocomposites fabricated by sol–gel process

Mechanical, surface, and thermal properties of polyamideimide–polydimethylsiloxane nanocomposites fabricated by sol–gel process

Study on the preparation and properties of novel block copolymeric materials based on structurally modified organometallic as well as organic polyamides and polydimethylsiloxane

Novel synthesis of polyimide–polyhybridsiloxane block copolymers via polyhydrosilylation: Characterization and physical properties

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