Hydrogen Bonding Effect on Probe Diffusion in Semidilute Polymer Solutions:  Polymer Chain Structure Dependence

Park, Ha Seon; Sung, Jaewon; Chang, Taihyun

doi:10.1021/ma951666u

Cited by 24 publications

(49 citation statements)

References 28 publications

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“…The aminosilane treatment significantly reduced the moisture diffusion coefficient, this was might because of the H‐bonding between TRSF and polymer matrix retards the diffusion of the water molecules and increases the activation energy of diffusion 47…”

Section: Resultsmentioning

confidence: 99%

The interfacial modification of rice straw fiber reinforced poly(butylene succinate) composites: Effect of aminosilane with different alkoxy groups

Zhao

Qiu

et al. 2012

J of Applied Polymer Sci

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The effect of aminosilane on the properties of rice straw fiber (RSF) reinforced poly(butylene succinate) (PBS) composites was studied. RSF was pretreated with four different aminosilane coupling agents, 3-aminopropyltriethoxysilane (APTES), 3-aminopropyltrimethoxysilane (APTMES), 3-(2-aminoethylaminopropyl)triethoxysilane (AEAPTES), and 3-(2-aminoethylaminopropyl)-trimethoxysilane (AEAPTMES). The results of Fourier transform infrared spectroscopy (FTIR) and f potential measurements confirmed that amino groups were introduced to the silane-treated RSF (TRSF) for all four silane coupling agents. The results also indicated a higher degree of hydroxyl ion adsorption by the fiber surface, which was chemically grafted by silane hydroxyl, was obtained with ethoxy silane than with methoxy silane. This difference might be because the relative rates of hydrolysis and ensuing silanol self-condensation of methoxy silane were too fast to reduce the number of silanol groups grafted on the fiber surface. The TRSF composite produced clearly enhanced tensile properties for the aminosilane coupling agents having ethoxy groups. The AEAPTES-RSF-PBS composite showed the highest tensile strength. It might be because of the higher amino content of AEAPTES than APTES; the amino groups on the surface of TRSF were confirmed by FT-IR to react with the carbonyl groups of PBS to form a blue-shifted hydrogen bond. The water absorption process of composites was found to follow the kinetics and mechanisms described by Fick's theory. The aminosilane treatment significantly reduced the moisture diffusion coefficient but did not change the mechanism of water adsorption. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 125: 3211-3220, 2012

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Section: Resultsmentioning

confidence: 99%

The interfacial modification of rice straw fiber reinforced poly(butylene succinate) composites: Effect of aminosilane with different alkoxy groups

Zhao

Qiu

et al. 2012

J of Applied Polymer Sci

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“…Additionally, specific interactions between the polymer and the molecule may also affect D . Hydrogen bonding has been found to slow down the translational diffusion of probes mainly in polymer/solvent systems [11, 12] but also in polymer films [13]. If this limitation of diffusion due to hydrogen bonding or other specific interactions is considerably high, neglecting such parameters by only taking into account a substance's molecular weight could lead to an exaggerative overestimation of D .…”

Section: Introductionmentioning

confidence: 99%

Diffusion studies through fluorescence recovery after photobleaching in hydrated polyamides

Hatzigrigoriou

Papaspyrides

Joly

et al. 2010

Polymer Engineering & Sci

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The effect of hydrogen bonding on the diffusivities of two almost identical fluorescent probes through polyamides was examined using fluorescence recovery after photobleaching (FRAP). The two molecules have the same geometry and a negligible difference in their molecular weight, the main difference confined is one characteristic group able to form a hydrogen bond with the polyamide matrices. Moreover, the effect of hydration on the diffusion coefficients and the plasticization activation energy is also studied as the experiments are repeated in various relative humidity environments. The differences in the diffusivities of the two molecules due to hydrogen bonding were as much as one order of magnitude regardless the matrix or the water content. In addition, it is shown that the plasticization activation energy of diffusion is also affected by matrix—diffusant interactions as the relevant values of the two examined diffusing molecules showed noticeable differences due to hydrogen bonding. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

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“…15 Several authors have previously discussed this justification to be able to describe the behavior of water molecules diffusing in polymer systems and attributed it to the structuralization of water around polar groups. 32,33 This may be responsible for the trend observed for untreated wood composites. It should be noted that it took the composites longer period (77 days) to attained equilibrium moisture saturation.…”

Section: Resultsmentioning

confidence: 92%

Water absorption behavior of heat-treated and untreated red balau saw dust/LDPE composites: Its kinetics and effects on mechanical properties

Lafia-Araga

Hassan

Yahya

et al. 2018

Journal of Thermoplastic Composite Materials

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The hygroscopic nature of wood limits the use of wood thermoplastic composites (WTC) in outdoor industrial and domestic applications. To reduce this tendency, red balau saw dust was heat treated at 180 and 200°C for 1 h and compounded with Low Density Poly(ethylene) (LDPE) into 20 and 37 wt% and then molded into test specimens by injection molding. Samples were immersed in distilled water at room temperature for 4 months. Heat-treated wood composites showed remarkable water resistance relative to untreated ones. Wood composites made from wood treated at 180 and 200°C exhibited almost similar water absorption pattern. Reduced water absorption of heat-treated wood composites relative to untreated ones indicates that heat treatment has resulted in a degree of modification of the wood. Most of the composites displayed the Fickian mode of water absorption with n values close to 0.5. Also, the diffusion coefficient reduced with wood content in untreated wood composites due to interaction of water with the polar groups in wood through hydrogen bonding. Untreated wood composites exhibited poorer mechanical properties with water immersion as a result of degradation due to moisture. The mechanical properties of the heat-treated wood composites were not adversely affected with water absorption. Therefore, heat treatment can reduce the proneness to water absorption in WTCs and alleviate the detrimental effects on mechanical properties.

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Hydrogen Bonding Effect on Probe Diffusion in Semidilute Polymer Solutions: Polymer Chain Structure Dependence

Cited by 24 publications

References 28 publications

The interfacial modification of rice straw fiber reinforced poly(butylene succinate) composites: Effect of aminosilane with different alkoxy groups

The interfacial modification of rice straw fiber reinforced poly(butylene succinate) composites: Effect of aminosilane with different alkoxy groups

Diffusion studies through fluorescence recovery after photobleaching in hydrated polyamides

Water absorption behavior of heat-treated and untreated red balau saw dust/LDPE composites: Its kinetics and effects on mechanical properties

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