Use of flow microcalorimetry and dynamic mechanical thermal analysis for probing interphase structure in poly(styrene-b-butadiene-b-styrene)/magnesium hydroxide composites

Liauw, Christopher M.; Dumitru, Paul; Lees, Graham C.; Rothon, Roger

doi:10.1163/156855403322667296

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…The decrease in tan d indicated that the level of damping was greater; this is usually associated with an increasing filler-matrix interaction. 6 Here, tan d of the MH-filled EVM vulcanizates also slightly decreased after the addition of MAA. Therefore, the results demonstrate that MAA strengthened the interactions between the MH particles and EVM matrix.…”

Section: Dynamic Mechanical Propertiesmentioning

confidence: 79%

“…[1][2][3][4] However, the addition of superfluous MH usually leads to a sharp decrease in the mechanical properties of the materials. Many investigations have been carried out on ways to improve the mechanical properties of MHfilled polymers; [5][6][7] these studies have mainly included two aspects. The first is the minimization of the particle size, 7,8 and the other is the surface treatment of the MH particles.…”

Section: Introductionmentioning

confidence: 99%

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Effect of methacrylic acid on the properties of Ethylene–Vinylene acetate rubber vulcanizates reinforced by magnesium hydroxide

Zhang

Ren

et al. 2011

J of Applied Polymer Sci

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Ethylene-vinyl acetate rubber (EVM) vulcanizates with excellent mechanical properties were obtained with magnesium hydroxides (MH) and methacrylic acid (MAA). MAA significantly improved the mechanical properties of the MH-filled EVM vulcanizates. The tensile strength, Shore A hardness, and tensile set modulus of the EVM vulcanizates significantly increased with increasing MAA content. The tensile strength of the MH-filled EVM vulcanizates increased from 12.3 to 18.5 MPa after the addition of 2.5 phr MAA when the MH content was fixed at 60 phr. The gross crosslink density and ionic crosslink density increased with increasing MAA content. The glass-transition temperature and tan d slightly decreased with increasing MAA content. Morphological study showed that MAA obviously improved the dispersion of the MH particles in the EVM matrix. The thermal stability of the EVM vulcanizates was obviously enhanced after the addition of MAA. Fourier transform infrared analysis indicated that MAA reacted with MH to form magnesium methacrylates, and there was a polymerization of MAA during the curing process in the existence of peroxide. An ionic crosslink bond was thought to be formed on the surface of the MH aggregates; this resulted in a possible structure where MH aggregates were considered as crosslink points.

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Section: Dynamic Mechanical Propertiesmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Effect of methacrylic acid on the properties of Ethylene–Vinylene acetate rubber vulcanizates reinforced by magnesium hydroxide

Zhang

Ren

et al. 2011

J of Applied Polymer Sci

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Interfacial modification of high impact polystyrene magnesium hydroxide composites effects on flame retardancy properties

Chang

Xie

Yang

2008

J of Applied Polymer Sci

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High impact polystyrene (HIPS)/magnesium hydroxide (MH) composites were prepared by meltblending. Two kinds of interfacial modifiers were used in this research, maleinated poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS-g-MA) triblock copolymer and PS. The effects of the use levels of SEBS-g-MA on the flame retardancy of HIPS/elastomer/MH based on unmodified and PS-modified surface were investigated by TEM, FTIR, and combustion tests (horizontal burning test and cone calorimetry). The combustion results showed that comparing composites containing unmodified MH, the flame retarding properties of composites containing PS-modified MH were obviously improved. The increased performance can be explained that the PS covered on the surface of MH could further improve dispersion of the filler in matrix. Furthermore, there existed a critical thickness of interfacial boundary for optimum flame-retarding properties in both ternary composites based MH and PS-modified MH. When the interfacial boundary relative thickness is less than 0.53, the introduction of SEBS-g-MA can improve the dispersion degree, leading the improvement of flame retardancy properties. However, with the increase of interfacial boundary thickness, the SEBS-g-MA coating around MH acted as a heat and mass transfer barrier, leading to the reduction of flame retardancy.

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Use of flow microcalorimetry and dynamic mechanical thermal analysis for probing interphase structure in poly(styrene-b-butadiene-b-styrene)/magnesium hydroxide composites

Cited by 2 publications

References 12 publications

Effect of methacrylic acid on the properties of Ethylene–Vinylene acetate rubber vulcanizates reinforced by magnesium hydroxide

Effect of methacrylic acid on the properties of Ethylene–Vinylene acetate rubber vulcanizates reinforced by magnesium hydroxide

Interfacial modification of high impact polystyrene magnesium hydroxide composites effects on flame retardancy properties

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