The lower surface free energy achievements from ladder polysilsesquioxanes with fluorinated side chains

Wang, Jinwei; Wang, Liping

doi:10.1016/j.jfluchem.2005.12.001

Cited by 12 publications

(9 citation statements)

References 17 publications

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“…Based on these results, the molecular structure shown in Figure 6 was proposed, showing features which are characteristic for polysilsesquioxane-based ladder polymers. [8][9][10] Furthermore, it is worth noting that the length calculated for the broad reflex at q 5 4.78 nm 21 (1.31 nm) is similar to the distance between parallel chains (1.25 nm) that was previously obtained for similar ladder polymers. 7-10 An additional result that supports the presence of a ladder structure in our polymer is the 29 Si-NMR signal (280 ppm) which exhibits a similar chemical shift as those of other ladder polysilsesquioxanes reported in the literature.…”

Section: Synthesis Of the Imide-containing Ladder Polyphenylsilsesquisupporting

confidence: 82%

Imide‐containing ladder polyphenylsilsesquioxanes with high thermal stability and thermoplastic properties

Chavez

Ionescu

Fasel

et al. 2013

J of Applied Polymer Sci

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This work reports for the first time the synthesis of ladder polyphenylsilsesquioxanes containing imide building blocks as parts of the main parallel chains. The ladder structure of the synthesized polymers was documented by means of small angle X-ray scattering (SAXS) measurements. The obtained ladder polymers exhibit stability with respect to decomposition up to temperatures as high as 460 C; additionally, they have melting points far below their decomposition temperatures, which make them interesting candidate materials for thermoplastic processing.

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Section: Synthesis Of the Imide-containing Ladder Polyphenylsilsesquisupporting

confidence: 82%

Imide‐containing ladder polyphenylsilsesquioxanes with high thermal stability and thermoplastic properties

Chavez

Ionescu

Fasel

et al. 2013

J of Applied Polymer Sci

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“…42 γ + and γare the Lewis acid and Lewis base parameters of the surface free energy, respectively. 43,44 γ LV is the surface tension of the liquid in equilibrium with its own vapor and subscripts 1, 2 and 3 represent liquids 1 (distilled water), 2 (formamide) and 3 (diiodomethane), respectively. 44 Surface tension values for the various liquids (distilled water, formamide and diiodomethane), needed to solve these equations, were those listed in Khayet et al, Pergal et al, Hwan et al and Vince et al [45][46][47][48] Eq.…”

Section: Poly(dimethylsiloxane)-based Tpu Nanocomposite Preparation mentioning

confidence: 99%

Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites

Pergal

Stefanović

Poręba

et al. 2017

Ind. Eng. Chem. Res.

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Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay, Cloisite 30B. DSC, TGA and DMTA analyses showed that TPU-NCs with organoclay content ≤5 wt % exhibited increased thermal stability, storage modulus and hard segment melt temperatures, but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. SWAXS confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on surfaces of TPUs with lower organoclay loadings (1 or 3wt %), or organoclay agglomerates in TPUs with higher amounts of organoclay (≥ 5 wt %) were detectable using SEM. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via AFM. Among the nanomaterials prepared, TPU-NC with 1 wt % of organoclay provided the best balance between organoclay concentration and the functional properties desired in biomedical applications.

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“…The surface energy can be determined by using the two‐liquid method [28] based on contact angle measurements with two different kinds of liquids, according to following equations: where θ is the contact angle, γ

_{italics}^{italicd}

and γ

_{italics}^{italicp}

are the contributions from dispersion and polar parts, respectively, toγ s , the surface energy of the fillers [29]. γ l is the surface energy of the liquid in equilibrium with its own vapor, γ

_{italicl}^{italicd}

and γ

_{italicl}^{italicp}

are the contributions from dispersion and polar parts, respectively, to the interfacial tension between liquid and vapor.…”

Section: Resultsmentioning

confidence: 99%

Cold plasma modification of boron nitride fillers and its effect on the thermal conductivity of silicone rubber/boron nitride composites

Zhang

Wang

et al. 2012

Polymer Composites

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Hexagonal boron nitride (h‐BN) fillers were first coated with low‐molecular‐weight polydimethylsiloxane (PDMS) by solution dispersion and then treated in argon plasma for different times. The modified h‐BN fillers were characterized by high‐resolution transmission electron microscopy, X‐ray photoelectron spectroscopy, and contact angle analysis. The results revealed that a thin PDMS film several nanometers thick was tightly coated on the surface of the h‐BN filler after plasma treatment, and this thin film could not be removed by 48 h Soxhlet extraction with n‐hexane at 120°C. Furthermore, the effect of plasma modification on the h‐BN filled silicone rubber composites was investigated. The results indicated that the plasma modification improved the interfacial interaction between h‐BN and the matrix, but hardly affected the distribution state of the h‐BN in the composites. The composites filled with the modified h‐BN exhibit significantly higher thermal conductivity than the composites filled with untreated h‐BN. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

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The lower surface free energy achievements from ladder polysilsesquioxanes with fluorinated side chains

Cited by 12 publications

References 17 publications

Imide‐containing ladder polyphenylsilsesquioxanes with high thermal stability and thermoplastic properties

Imide‐containing ladder polyphenylsilsesquioxanes with high thermal stability and thermoplastic properties

Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites

Cold plasma modification of boron nitride fillers and its effect on the thermal conductivity of silicone rubber/boron nitride composites

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