Dynamic mechanical and thermal properties of physically compatibilized natural rubber/poly(methyl methacrylate) blends by the addition of natural rubber-graft- poly(methyl methacrylate)

Oommen, Zachariah; Groeninckx, Gabriël; Thomas, Sabu

doi:10.1002/(sici)1099-0488(20000215)38:4<525::aid-polb4>3.0.co;2-t

Cited by 95 publications

(65 citation statements)

References 21 publications

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“…The modification of rubbers by chemical methods has also been used for preparation of various rubber derivatives such as photocrosslinkable rubbers and thermoplastic elastomers [4,5]. Another interesting way to modify properties of rubber is to graft thermoplastic structures on the rubber chains, such as poly(methyl methacrylate) or PMMA and polystyrene [6,7]. These graft copolymers present a flexible polyisoprene backbone that gives an elastic character to the material and the 2 rigid thermoplastic grafts that ensure their reinforcement and possible reprocessing ability.…”

Section: Introductionsupporting

confidence: 81%

Synthesis of ATRP macroinitiator based on synthetic cis- 1,4-polyisoprene and its application for graft polymerization of MMA

et al. 2010

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Modification of synthetic cis-1,4-polyisoprene (PI) into bromoalkylfunctionalized polyisoprene (PIBr), an ATRP macroinitiator, was investigated by two-step chemical reaction. The PI was partially epoxidized into epoxidized polyisoprene (EPI) using m-chloroperbenzoic acid, then the EPI was transformed into PIBr by reaction with 2-bromo-2-methylpropionic acid. The results from 1 H NMR revealed that the addition product occurs in competition with epoxide ring rearrangement. The amount of bromoalkyl functionalized units was determined from 1 H NMR spectra. The graft polymerization of MMA using ATRP technique from macroinitiator units in PIBr was investigated using three different ligands, i.e. N-(n-octyl)-2-pyridylmethanimine (NOPMI), N-(n-octadecyl)-2-pyridylmethanimine (NODPMI) and 1,1,4,7,7-pentamethyldiethylenetriamine (PMDETA), resulting in formation of graft copolymer of PI and PMMA. The PMMA grafts were successfully separated from the PI backbone using acidolysis for studying their number-average molecular weights ( SEC n, M) and polydispersity indexes (PDI). All of the ligands used give a increase of n M with MMA conversion. Comparing between 3 ligands, Cu(I)Br complexed with NOPMI shows first-order kinetic plot.

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Section: Introductionsupporting

confidence: 81%

Synthesis of ATRP macroinitiator based on synthetic cis- 1,4-polyisoprene and its application for graft polymerization of MMA

et al. 2010

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“…Oommen et al [43] reported that the entanglement density increases as a result of compatibilisation. It is interesting to note that, the entanglement density increases up to 2.5 wt% of compatibilizer concentration followed by a decrease at higher loading.…”

Section: Degree Of Entanglement Densitymentioning

confidence: 99%

Dynamic mechanical analysis of binary and ternary polymer blends based on nylon copolymer/EPDM rubber and EPM grafted maleic anhydride compatibilizer

George¹,

Komalan²,

Kumar³

et al. 2007

Express Polym. Lett.

117

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Abstract. The dynamic mechanical properties such as storage modulus, loss modulus and damping properties of blends of nylon copolymer (PA6,66) with ethylene propylene diene (EPDM) rubber was investigated with special reference to the effect of blend ratio and compatibilisation over a temperature range -100°C to 150°C at different frequencies. The effect of change in the composition of the polymer blends on tanδ was studied to understand the extent of polymer miscibility and damping characteristics. The loss tangent curve of the blends exhibited two transition peaks, corresponding to the glass transition temperature (Tg) of individual components indicating incompatibility of the blend systems. The morphology of the blends has been examined by using scanning electron microscopy. The Arrhenius relationship was used to calculate the activation energy for the glass transition of the blends. Finally, attempts have been made to compare the experimental data with theoretical models.

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“…are used in many demanding applications where the properties of thermal stability and fire resistance are priorities and therefore have been extensively studied [1][2][3][4]. Polymer blending has been reported to have great impact on the thermal stability of polymers [5][6][7][8][9][10][11][12][13]. Compatibility between two components in a binary blend is one of the decisive factors, which determines the thermal stability of polymer blends [14][15][16][17][18][19], and therefore compatibilisation has profound effect on the thermal stability of polymer blends.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation and crystallisation studies of reactively compatibilised polymer blends

Jose

Thomas

Biju

et al. 2008

Polymer Degradation and Stability

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Dynamic mechanical and thermal properties of physically compatibilized natural rubber/poly(methyl methacrylate) blends by the addition of natural rubber-graft- poly(methyl methacrylate)

Cited by 95 publications

References 21 publications

Synthesis of ATRP macroinitiator based on synthetic cis- 1,4-polyisoprene and its application for graft polymerization of MMA

Synthesis of ATRP macroinitiator based on synthetic cis- 1,4-polyisoprene and its application for graft polymerization of MMA

Dynamic mechanical analysis of binary and ternary polymer blends based on nylon copolymer/EPDM rubber and EPM grafted maleic anhydride compatibilizer

Thermal degradation and crystallisation studies of reactively compatibilised polymer blends

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