Effect of UV radiation on some semi-interpenetrating polymer networks based on polyurethane and epoxy resin

Roşu, Dan; Roşu, Liliana; Mustaţă, Fanica; Varganici, Cristian–Dragos

doi:10.1016/j.polymdegradstab.2012.05.035

Cited by 44 publications

(17 citation statements)

References 20 publications

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“…An accelerated degradation is obtained as the working temperature increases because the quicker diffusion of oxygen feeds this process. The related mechanism was previously reported [11,27]. The temperature of 110°C would be considered as an acceptable value for reliable experiments.…”

Section: Resultsmentioning

confidence: 62%

Thermal stability of gamma-irradiated polyurethane/POSS hybrid materials

Zaharescu¹,

Marinescu²,

Hebda

et al. 2017

J Therm Anal Calorim

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In this work, new version: we report essential data on the stability of gamma-irradiated polyurethanes chemically modified by octa(3-hydroxy-3-methylbutylmethylsiloxy) POSS (o-POSS) which varies from 2, 4, 6, 8 to 10 mass%. These hybrid materials were tested by isothermal (190°C) and nonisothermal (b = 2, 3.7, 5 and 10 K min -1 ) chemiluminescence, and the thermal stability of gamma-radiation-aged samples was correlated with the change in the nanofiller loading and absorbed dose. The compositions where inorganic phase is less than 6% show an increasing thermal strength as o-POSS concentration enhances. The other samples with higher nanoparticle content present less stability in respect of inferior homologous composition. The nonisothermal chemiluminescence profiles are changing from one type of sample to the other where nanofiller induces different effects. The considerations on mechanistic aspects are discussed, too.

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Section: Resultsmentioning

confidence: 62%

Thermal stability of gamma-irradiated polyurethane/POSS hybrid materials

Zaharescu¹,

Marinescu²,

Hebda

et al. 2017

J Therm Anal Calorim

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“…하지만 현재 공항 활주로 포장용 유지보수 재 료로 사용되는 에폭시 계열의 폴리머 콘크리트는 자외선 에 의해 재료의 물성이 민감하게 변화하는 재료로 알려져 있다. 자외선에 노출 된 에폭시의 경우 화학적 구조에 따라 광열화 현상 (Photo-degradation)이 다르게 일어나며, 광열 화 반응을 통해 재료의 물리적 특성이 변화한다 [7]. 따라서 본 연구에서는 에폭시 계열의 폴리머 콘크리트를 사용한 공항 활주로 유지보수 재료의 자외선에 의한 기계적 물성 변화여부를 자외선 발생기를 이용하여 실험적으로 규명하 는 연구를 수행하였다.…”

Section: 서 론unclassified

Evaluation of Mechanical Property Variation of Epoxy Based Compliant Polymer Concretes Exposed to UV Light

Roh¹,

Jung²,

Chang³

2014

Composites Research

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This paper aims to evaluate material property variation of polymer concretes under ultra-violet exposure condition. The components and mixing ratio of the polymer composite specimens were determined by the previous research results. The equivalent UV exposure time was calculated with the consideration of the power of metal halide lamp and maximum 3 years were selected for the experiments. From the tests, it was found that the generated heat during UV exposure affected much the material properties of polymer concrete by means of post cure. As a result, the compressive strength increased and ductility factor decreased.

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“…The most conventional method to modify the surface of PDMS is the interpenetrating polymer network (IPN) . Over the different span of time, numerous researchers have reported various types of PDMS‐based IPNs from via synthetic route to achieved control wettability of PDMS . Yu and Han have showed a methodology for producing a stable PEO‐tethered PDMS surface having controllable wetting by a swelling–deswelling process .…”

Section: Introductionmentioning

confidence: 99%

Modification of polydimethylsiloxane with polyvinylpyrrolidone: Influence of reinforcing filler on physico-mechanical properties

Banerjee

Ramakrishnan²,

Satapathy

2016

Polym Eng Sci

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The present article reports an approach for the modification of hydrophobic polydimethylsiloxane (PDMS) with low molecular weight hydrophilic polyvinylpyrrolidone (PVP) via solution blending method to develop new PDMS-based materials with improved mechanical performance and wettability which can be used in many biomedical applications. The influence of dimethyldichlorosilane treated fumed silica (FS) on physico-mechanical properties of PDMS-PVP blends were investigated and analyzed. There was the significant improvement in mechanical, dynamic mechanical and thermal properties of PDMS-PVP blends, whereas, transparency and contact angle were slightly decreased after incorporation of FS into PDMS-PVP blends. Scanning electron microscopy revealed that the fourfold reduction in the average domain size of the dispersed PVP in the PDMS matrix in the presence of compatibilizer (PDMS-PEO block copolymer) when compared with the uncompatibilized PDMS-PVP blend morphology. By incorporation of FS into the neat PDMS matrix, the onset of degradation (T i ), the maximum rate of degradation (T max ) and overall thermal stabilities increased significantly. On the other hand, by the addition of FS into to PDMS-PVP blends, the T i and T max remains unaffected, but overall thermal stabilities increased significantly. PDMS-PVP blends exhibited low contact angle (458) which confirmed the formation of the hydrophilic surface. POLYM. ENG. SCI.,

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Effect of UV radiation on some semi-interpenetrating polymer networks based on polyurethane and epoxy resin

Cited by 44 publications

References 20 publications

Thermal stability of gamma-irradiated polyurethane/POSS hybrid materials

Thermal stability of gamma-irradiated polyurethane/POSS hybrid materials

Evaluation of Mechanical Property Variation of Epoxy Based Compliant Polymer Concretes Exposed to UV Light

Modification of polydimethylsiloxane with polyvinylpyrrolidone: Influence of reinforcing filler on physico-mechanical properties

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