The influence of pre-compounding techniques and surface modification of nano-silica on the properties of thermoplastic natural rubber

In this paper, nanocomposite was synthesized with nano silica and poly-α-olefin, and the effects of surface modification to the nano silica on its drag reduction performance were investigated. The dosage coupling agent, Y-aminopropyltriethoxysilane, and the modification temperature were studied intensively through surface hydroxyl and oil adsorption analysis. The test results indicated that the hydroxyl number of the silica was decreased by Y-aminopropyltriethoxysilane modification, with improved lipophilicity and oil adsorption. At 50°C, the optimum Y-aminopropyltriethoxysilane dosages were 15% for Nano-Si-10, 5% for Nano-Si-20, and 10% for Degussa-R972. The modification significantly changed the nano silica surface properties and enhanced the interaction with poly-α-olefin. Through drag reduction and shear resistance tests by rotating disk 40 mins degradation and testing loop 2 times shearing, it was shown that the nanocomposite possessed good drag reduction and excellent shear resistance properties.

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Composites from Thermoplastic Natural Rubber Reinforced Rubberwood Sawdust: Effects of Sawdust Size and Content on Thermal, Physical, and Mechanical Properties

International Journal of Polymer Science ◽

10.1155/2018/7179527 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 5

Author(s):

Chatree Homkhiew ◽

Surasit Rawangwong ◽

Worapong Boonchouytan ◽

Wiriya Thongruang ◽

Thanate Ratanawilai

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Natural Rubber ◽

High Density Polyethylene ◽

High Performance ◽

Physical And Mechanical Properties ◽

Modulus Of Rupture ◽

Shore Hardness ◽

Thermoplastic Natural Rubber ◽

Plastic Content

The aim of this work is to investigate the effects of rubberwood sawdust (RWS) size and content as well as the ratio of natural rubber (NR)/high-density polyethylene (HDPE) blend on properties of RWS reinforced thermoplastic natural rubber (TPNR) composites. The addition of RWS about 30–50 wt% improved the modulus of the rupture and tensile strength of TPNR composites blending with NR/HDPE ratios of 60/40 and 50/50. TPNR composites reinforced with RWS 80 mesh yielded better tensile strength and modulus of rupture than the composites with RWS 40 mesh. The TPNR/RWS composites with larger HDPE content gave higher tensile, flexural, and Shore hardness properties and thermal stability as well as lower water absorption. The TPNR/RWS composites with larger plastic content were therefore suggested for applications requiring high performance of thermal, physical, and mechanical properties.

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Mechanical Properties of Kenaf–Thermoplastic Natural Rubber Composites

Polymer-Plastics Technology and Engineering ◽

10.1081/ppt-120017956 ◽

2003 ◽

Vol 42 (3) ◽

pp. 345-355 ◽

Cited By ~ 16

Author(s):

J. K. Sameni ◽

S. H. Ahmad ◽

S. Zakaria

Keyword(s):

Mechanical Properties ◽

Natural Rubber ◽

Rubber Composites ◽

Natural Rubber Composites ◽

Thermoplastic Natural Rubber

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Characterization and Morphology of Modified Multi-Walled Carbon Nanotubes Filled Thermoplastic Natural Rubber (TPNR) Composite

Syntheses and Applications of Carbon Nanotubes and Their Composites ◽

10.5772/50726 ◽

2013 ◽

Cited By ~ 3

Author(s):

Mouad A. ◽

Sahrim Hj.

Keyword(s):

Carbon Nanotubes ◽

Natural Rubber ◽

Multi Walled Carbon Nanotubes ◽

Thermoplastic Natural Rubber ◽

Walled Carbon Nanotubes

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Application of Image And X-Ray Microtomography Technique To Quantify Filler Distribution In Thermoplastic-Natural Rubber Blend Composites

10.1063/1.3295585 ◽

2010 ◽

Author(s):

Sahrim Ahmad ◽

A. Aziz Mohamed ◽

Jaafar Abdullah ◽

Hafizal Yazid ◽

M. Dahlan ◽

...

Keyword(s):

Natural Rubber ◽

X Ray ◽

Rubber Blend ◽

Thermoplastic Natural Rubber ◽

Filler Distribution

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Thermal Properties and Crystallisation Behaviour of Thermoplastic Natural Rubber (TPNR) Nanocomposites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.812.125 ◽

2013 ◽

Vol 812 ◽

pp. 125-130 ◽

Cited By ~ 1

Author(s):

Siti Norasmah Surip ◽

Z.Y. Zhang ◽

H.N. Dhakal ◽

N.N. Bonnia ◽

S. H. Ahmad

Keyword(s):

Thermal Properties ◽

Natural Rubber ◽

Nucleating Agent ◽

Preparation Technique ◽

Preparation Methods ◽

Blending Method ◽

Liquid Natural Rubber ◽

Tan Δ ◽

Thermoplastic Natural Rubber ◽

Internal Mixer

The effect of preparation technique on the crystallisation behavior and thermal properties of TPNR filled nanoclay nanocomposites was investigated. The nanocomposites were prepared via melt blending method using internal mixer (Haake 600P). Two types of nanocomposites preparation technique were employed which is method A and B. In method A, the nanoclay was pre-mixed with liquid natural rubber (LNR) before it was charged into the other materials. For method B, the nanoclay was directly charged into the molten TPNR matrix. The result shows, preparation methods were significantly affect the crystallinity and thermal properties of TPNR nanocomposites. DSC thermogram revealed that nanocomposites crystallinity was increased when prepared by method A but decreased with method B. An increment in polypropylene crystallinity was attributed by the nanoclay which is believed to be as a nucleating agent. DMA thermogram suggested that the preparation method has affected the storage modulus and tan δ but not the glass transition temperature (tg).

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Thermoplastic Natural Rubber of Co-Polyamide: Effect of Blend Ratios on Mechanical, Swelling, Dynamic and Morphological Properties

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.844.89 ◽

2013 ◽

Vol 844 ◽

pp. 89-92

Author(s):

Boripat Sripornsawat ◽

Azizon Kaesaman ◽

Charoen Nakason

Keyword(s):

Natural Rubber ◽

Dynamic Properties ◽

Complex Viscosity ◽

Continuous Phase ◽

Morphological Properties ◽

Elongation At Break ◽

Degree Of Swelling ◽

Tan Δ ◽

Thermoplastic Natural Rubber ◽

Blend Ratios

Maleated natural rubber (MNR) was synthesized and formulated to prepare thermoplastic natural rubber (TPNR) by blending with co-polyamide (COPA). It was found that 100% modulus, tensile strength, elongation at break, hardness and degree of swelling increased with increasing proportion of COPA. However, degree of swelling and tension set value decreased which reflects enhancing of rubber elasticity. Dynamic properties were also determined by a rotor less oscillating shear rheometer (Rheo Tech MDpt). It was found that increasing proportion of MNR caused increasing of storage modulus and complex viscosity but decreasing tan δ value. Morphological properties were also determined by SEM technique. It was found that the MNR/COPA simple blends with the proportion of rubber 40, 50 and 60 wt% exhibited the co-continuous phase structures.

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