Chemistry of Siloxane Amide as a New Curing Agent for Epoxy Resins: Material Characterization and Properties

Srividhya, M.; Lakshmi, M. Suguna; Reddy, Boreddy Sivarami R.

doi:10.1002/macp.200500143

Cited by 28 publications

(26 citation statements)

References 58 publications

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“…The epoxides were also thermally cured with the corresponding telechelic amine‐functionalized siloxanes as shown in Figure 4. The synthetic approaches for attaching the glycidyl epoxide and amine groups onto the ends of the siloxane have been recently reported 30, 31. Acetic acid was observed to accelerate the thermal cure at 120°C and consequently was chosen as a curing catalyst for this study.…”

Section: Resultsmentioning

confidence: 99%

“…Because of cost issues of amine telechelic and epoxide telechelic siloxanes, almost no applications use these together. Amine‐functionalized siloxanes are used for curing conventional epoxy resins 30. Miscibility of these functionalized siloxanes with the epoxy resins, enhances compatibility, ensures homogeneous particle distribution, and thus leads to effective toughening 31.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and film properties of thermally curable polysiloxane

Chakraborty

Soucek

2009

J of Applied Polymer Sci

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Telechelic glycidyl epoxide siloxanes substituted with either methyl, cyclopentyl, or cyclohexyl groups were cured thermally with corresponding telechelic aliphatic amine. Also, the three glycidyl epoxide functionalized siloxanes were homopolymerized via a photoinitiated cationic mechanism. Both the UV and thermal curing were performed by formulating with reactive diluents. The mechanical properties, viscoelastic behavior, and coatings properties of the thermally cured siloxanes were studied. In addition, the X-ray measurements were performed. The rate of polymerization increased with the increasing size of substituent on the siloxane backbone. The hardness, adhesion, and solvent resistance increased as the bulk of the substituent increased in the siloxane backbone. The release properties for adhesion and readhesion increased with increase in steric bulk of the backbone substituents. Crosslink density reduced and oxygen permeability increased with increase in siloxane substituent size. There was also an increase in the advancing and the receding contact angles with the increase in substituent size. The inverse dependency of substituent size and free volume was observed in the d-spacing of the X-ray data.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical and film properties of thermally curable polysiloxane

Chakraborty

Soucek

2009

J of Applied Polymer Sci

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“…Epoxy resins are largely used in nanocomposite materials [13], coatings [14] and structural adhesives [15]. GCC is a kind of inorganic material, and its surface contains a large amount of hydroxyl radicals incompatible with epoxy compounds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of stearic acid modified ground calcium carbonate (SA-GCC) hybrid material and properties of SA-GCC/epoxy composites coating

Luo

Yang

2015

Russ J Appl Chem

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Ground calcium carbonate (GCC) was modifi ed by stearic acid (SA), and SA-GCC hybrid materials were obtained. The modifi ed GCC (SA-GCC) were characterized by infrared spectroscopy (FTIR), thermal gravimetric (TGA), particle size analysis and hydrophobicity. The results showed that SA was chemically bound onto the surface of GCC. GCC (60 wt %) modifi ed with 1 wt % of SA was fi lled into epoxy matrix to prepare composite coating by high-pressure spraying method and thermal curing process. The properties of SA-GCC/ epoxy composites coating, such as adhesion, corrosion protection, were investigated by electrochemical impedance spectroscopy (EIS), autoclave testing and others instruments. The results demonstrated that SA-GCC/ epoxy composites coating possess improved adhesion, corrosion resistance and thermal stability. High temperature and pressure testing indicated that the performance of such coating increased greatly.

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“…To improve these properties, while at the same time retaining other properties, a second component such as the thermoplastics of PEEK, polyester and polyurethane, and the familiar reactive liquid rubber have been reported 2. Recently, the introduction of siloxanes as modifiers to epoxy resins is attracting more researchers in this field 1, 3, 4. Some unique characteristics of siloxane structures, such as low surface tension, good low temperature flexibility, nonflammability, and high resistance to thermal oxidation, could perhaps render them useful as epoxy modifiers.…”

Section: Introductionmentioning

confidence: 99%

Properties of alkoxysilane functionalized polycaprolactone/polydimethylsiloxane‐modified epoxy resin composites: Effect of curing temperature and compositions

Liu

Song

Lin

et al. 2009

J of Applied Polymer Sci

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A series of epoxy resin composites containing different contents of alkoxysilane functionalized polycaprolactone/polydimethylsiloxane (PCS-2Si) were prepared after curing with polyamidoamine curing agent at different temperatures. The effects of PCS-2Si content and curing temperature on morphologies, solvent resistance, and surface properties of the composites were studied. The scanning electron microscope results showed that increasing the PCS-2Si content and curing temperature caused the changes of miscibility between epoxy and modifier, leading to different morphologies. Other data from solvent swelling and surface tension of composites cured at the same temperature illustrated that the modified epoxy resins with higher content of PCS-2Si had less crosslinked networks, but lower surface tension. At the same time, the composites cured at higher curing temperature generally had more resistance to chemicals and higher surface tension due to the formation of highly crosslinked networks.

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Chemistry of Siloxane Amide as a New Curing Agent for Epoxy Resins: Material Characterization and Properties

Cited by 28 publications

References 58 publications

Mechanical and film properties of thermally curable polysiloxane

Mechanical and film properties of thermally curable polysiloxane

Synthesis of stearic acid modified ground calcium carbonate (SA-GCC) hybrid material and properties of SA-GCC/epoxy composites coating

Properties of alkoxysilane functionalized polycaprolactone/polydimethylsiloxane‐modified epoxy resin composites: Effect of curing temperature and compositions

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