Reactive extrusion processing of polypropylene/SiO2 nanocomposites by in situ synthesis of the nanofillers: Experiments and properties

Kluenker, E.; Faymonville, J.; Peter, K. V.; Moeller, Martin; Hopmann, Christian

doi:10.1016/j.polymer.2014.08.059

Cited by 13 publications

(12 citation statements)

References 16 publications

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“…The formation of homogeneously distributed, nano scaled silica particles within polypropylene requires a high miscibility of the precursor within the melt. The miscibility is the higher the longer the alkyl chains and the more ethoxy end groups are replaced by them …”

Section: Conversion Of Modified Paos To Silica In Dependence On Kind mentioning

confidence: 99%

“…Introduction of 12.5 mol% of hexadecyl groups in relation to all end groups (P[C 16 Sil(12,7%)‐ co ‐EtO]Si) yield in an increase of the precursor miscibility with polypropylene up to 13 wt.%. After conversion of the P[C 16 Sil(12,7%)‐ co ‐EtO]Si to hexadecyl chains modified silica (C 16 ‐silica) by humidity and a suitable catalyst the resulting SiO 2 /PP nanocomposite contains homogeneously distributed C 16 ‐silica particles of 20 nm in size and are free of agglomeration …”

Section: Introductionmentioning

confidence: 99%

“…After subsequently conversion of migrated PAOS to hydrophilic silica by humidity the polymer surface becomes hydrophilic. Such approach overcomes the thermodynamically hindrance of hydrophilic additive migration to a non‐polar surface …”

Section: Introductionmentioning

confidence: 99%

“…After conversion of the P[C 16 Sil-(12,7%)-co-EtO]Si to hexadecyl chains modified silica (C 16 -silica) by humidity and a suitable catalyst the resulting SiO 2 /PP nanocomposite contains homogeneously distributed C 16 -silica particles of 20 nm in size and are free of agglomeration. [3] A further important property of unmodified PAOS is the surface activity of this hydrophobic compound which is able to modify a polymer surface by migration. After subsequently conversion of migrated PAOS to hydrophilic silica by humidity the polymer surface becomes hydrophilic.…”

Section: Introductionmentioning

confidence: 99%

“…Such approach overcomes the thermodynamically hindrance of hydrophilic additive migration to a non-polar surface. [3,4] PAOS is synthesized by a non-aqueous one pot polycondensation reaction according to Zhu et al (Figure 1). [1] In the present paper we applied PAOS which is modified by alkyl chains of various lengths and investigate the influence of the PAOS structure changes on thermal properties and degree and rate of its conversion to silica.…”

Section: Introductionmentioning

confidence: 99%

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Hyper Branched Silica Precursor Poly(alkoxysiloxane): Influence of Alkyl Group Modification on Thermal Stability and Conversion to Silica

Swaton-Höckels

Peter

Möller

2017

Macromolecular Symposia

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Alkyl group modified hyper branched poly(alkoxysiloxane)s (PAOS) were synthesized via a one‐pot co‐monomer route based on a non‐aqueous condensation reaction. By using tri(ethoxyalkylsilane) as co‐monomer we are able to introduce a high amount of alkyl groups into the PAOS molecule. The chemical structure and degree of modification were analyzed by 29Si‐NMR and GPC. According to thermal gravimetric analysis (TGA) the conversion of PAOS to silica is highly affected by type and the content of the modifying units. With increasing of both the chain length and the quantity of alkyl groups the rate of conversion of PAOS to silica is decreased. Additionally, we discuss the influence of atmosphere and temperature on the degree of conversion to silica within a defined time.

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Section: Conversion Of Modified Paos To Silica In Dependence On Kind mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hyper Branched Silica Precursor Poly(alkoxysiloxane): Influence of Alkyl Group Modification on Thermal Stability and Conversion to Silica

Swaton-Höckels

Peter

Möller

2017

Macromolecular Symposia

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In situ Synthesis of Inorganic and/or Organic Phases in Thermoplastic Polymers by Reactive Extrusion

2017

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Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

Kaßner

Zhu

Schaefer

et al. 2022

J of Applied Polymer Sci

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The surface modification of textile fibers by coating with nanostructured organic–inorganic hybrid materials is presented. The hydrophobic, solvent resistant and mechanically robust coatings were produced by combining the twin monomer 2,2′‐spirobi[benzo‐4H‐1,3,2‐dioxasiline] (TM) and polyalkoxysiloxanes (silica precursor polymers) in a catalyzed polymerization process. For the application in textile finishing, both aqueous emulsions and ethanolic solutions of mixtures were developed. The precisely adjusted ratio of TM and polyalkoxysiloxanes enabled controlling of the organic and inorganic portions in the hybrid layer. The polymerization process can be advantageously combined with the ring‐opening polymerization of hexamethylcyclotrisiloxane (HMCTS). The resulting ethanolic twin prepolymer solutions and the polyethoxysiloxane emulsions were easy to handle and thus represent a novel and attractive binder for PET surfaces. The coated fabrics were analyzed by means of scanning electron microscopy and X‐ray photoelectron spectroscopy showing hybrid material formation as a homogeneous, sealed surface layer. Improved hydrophobicity as well as resistance to mechanical stress was proven by water droplet‐ and Martindale tests.

show abstract

Reactive extrusion processing of polypropylene/SiO2 nanocomposites by in situ synthesis of the nanofillers: Experiments and properties

Cited by 13 publications

References 16 publications

Hyper Branched Silica Precursor Poly(alkoxysiloxane): Influence of Alkyl Group Modification on Thermal Stability and Conversion to Silica

Hyper Branched Silica Precursor Poly(alkoxysiloxane): Influence of Alkyl Group Modification on Thermal Stability and Conversion to Silica

In situ Synthesis of Inorganic and/or Organic Phases in Thermoplastic Polymers by Reactive Extrusion

Textile functionalization by combination of twin polymerization and polyalkoxysiloxane‐based sol–gel chemistry

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