Morphology development and compatibilization effect in nanoclay filled rubber blends

Brittle Polylactic acid (PLA) was toughened by introducing 5-20 wt. % of Natural Rubber (NR) through melt blending in a twin screw extruder. The results of tensile strength and Young’s modulus of PLA/NR blends were dramatically decreased. Maleic anhydride grafted natural rubber (NR-g-MA) was prepared and used to enhance the blends performance. The preparation of NR-g-MA was carried out using internal mixer by free radical melt grafting reaction followed by Fourier transform infrared spectroscopy (FTIR) to analyze the incorporation of MA on the NR. The compatibilization effect on the mechanical properties of PLA/NR blends was investigated with addition of 3 phr NR-g-MA. Comparison between PLA/NR/Compatibilizer and virgin PLA/NR blends significantly improved on the mechanical properties. FTIR result confirmed grafting reaction occurred between MA and NR.

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Experimental analysis on the technical behavior of carbon black filled rubber blends’ rollers for rice husk removal application

Polimery ◽

10.14314/polimery.2019.1.6 ◽

2019 ◽

Vol 64 (01) ◽

pp. 50-55

Author(s):

Prabhakaran Paramasivam ◽

Rajesh Ranganathan ◽

Rajasekar Rathanasamy ◽

Gobinath Velu Kaliyannan ◽

Sathish Kumar Palaniappan ◽

...

Keyword(s):

Carbon Black ◽

Rice Husk ◽

Experimental Analysis ◽

Rubber Blends ◽

Filled Rubber

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Curing characteristics and rheological properties of bentonite- filled rubber blends

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1199/1/012037 ◽

2021 ◽

Vol 1199 (1) ◽

pp. 012037

Author(s):

Z Mičicová ◽

S Božeková ◽

M Pajtášová ◽

D Ondrušová

Keyword(s):

Fine Fraction ◽

Rheological Behaviour ◽

Complex Viscosity ◽

Partial Replacement ◽

Optimum Time ◽

Maximum Torque ◽

Rubber Blends ◽

Filled Rubber ◽

Curing Characteristics ◽

Strain Sweep

Abstract The study deals with the examination of the rheological behaviour of rubber blends which were filled with bentonite. The filler - polymer as well as the filler - filler interactions were studied and determined from the frequency sweep and strain sweep rheological measurements. The used natural bentonite was extracted from the locality called Jelsovy Potok. The natural bentonite had a fine fraction with a particle size of 15μm a 45 μm and it was added into rubber blends as a partial replacement of commonly used filler. The rubber blends were characterised on the basis of curing characteristics (minimum torque ML, maximum torque MH, optimum time of cure t(c90), processing safety of blend ts,). Moreover, the complex viscosity and Payne effect were also specified. The required measurements were done by using PRPA 2000.

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Influence of Compatibilizer on Mechanical Properties of Polylactic Acid/Natural Rubber Blends

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.554.81 ◽

2014 ◽

Vol 554 ◽

pp. 81-85 ◽

Cited By ~ 5

Author(s):

Nor Nisa Balqis Mohammad ◽

Agus Arsad ◽

Abdul Razak Rahmat ◽

Mohammad Shukor Talib ◽

Mohd Shaiful Zaidi Mat Desa

Keyword(s):

Mechanical Properties ◽

Natural Rubber ◽

Renewable Resources ◽

Poly Lactic Acid ◽

Rubber Blends ◽

Grafting Reaction ◽

Melt Grafting ◽

Twin Screw ◽

Compatibilization Effect ◽

Internal Mixer

Derived from renewable resources, Poly (lactic) acid (PLA) exhibits good mechanical properties comparable with conventional polyolefins. However, major obstacle in PLA which may limit its application is due to brittleness. Thus, PLA requires toughening to overcome the weakness. In this study, PLA was blended with different ratio of natural rubber (0 to 20 wt.%) through melt blending in a twin screw extruder. The results of tensile strength and Young’s modulus of PLA/NR blends were decreased. In order to enhance the blend performance, PLA grafted maleic anhydride (PLA-g-MA) was used as compatibilizer. The preparation of PLA-g-MA was carried out using internal mixer by free radical melt grafting reaction followed by Fourier Transform Infrared Spectroscopy (FTIR) analysis to confirm the grafting reaction. To investigate the compatibilization effect on the mechanical properties of PLA/NR blends, PLA-g-MA was added to the blends at various compositions (1 – 10 phr). Mechanical properties increased markedly compared to the virgin PLA/NR blends and FTIR result confirmed grafting reaction occurred between MA and PLA.

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