Dynamic mechanical properties of natural rubber vulcanizates with different curing systems and static strain

AbstractIn present work, the effect of novel blocked mercaptosilane(3- propionylthio-1-propyltrimethoxylsilane) (called hereafter PXT) on structure and dynamic mechanical properties of natural rubber/silica (NR/silica) composites was studied in efficient, semi-efficient and conventional vulcanization systems. Equilibrium swelling method investigation indicates that PXT is able to enhance crosslinking density of composites. The investigation of properties shows that PXT can strengthen the reinforcement of silica for NR vulcanizates and substantially enhance the resistance to flex cracking and abrasion of NR/silica composites. Since PXT possess two functionally active end groups which can chemically react with both silica and rubber, at 2 phr of the PXT content, NR/silica composites possess optimum comprehensive dynamic mechanical properties.

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Dynamic mechanical properties and hysteresis loss of epoxidized natural rubber chemically bonded to the silica surface

Journal of Applied Polymer Science ◽

10.1002/app.10382 ◽

2002 ◽

Vol 84 (12) ◽

pp. 2171-2177 ◽

Cited By ~ 23

Author(s):

Ajay K. Manna ◽

P. P. De ◽

D. K. Tripathy

Keyword(s):

Mechanical Properties ◽

Natural Rubber ◽

Silica Surface ◽

Dynamic Mechanical Properties ◽

Hysteresis Loss ◽

Epoxidized Natural Rubber ◽

Dynamic Mechanical

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Dynamic Mechanical Properties of Vietnam Modified Natural Rubber via Grafting with Styrene

International Journal of Polymer Science ◽

10.1155/2017/4956102 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

T. A. Dung ◽

N. T. Nhan ◽

N. T. Thuong ◽

D. Q. Viet ◽

N. H. Tung ◽

...

Keyword(s):

Mechanical Properties ◽

Natural Rubber ◽

Graft Copolymer ◽

Graft Copolymerization ◽

Dynamic Mechanical Properties ◽

Dynamic Mechanical ◽

Tert Butyl Hydroperoxide ◽

Wide Range ◽

Redox Initiator ◽

Tetraethylene Pentamine

The dynamic mechanical behavior of modified deproteinized natural rubber (DPNR) prepared by graft copolymerization with various styrene contents was investigated at a wide range of temperatures. Graft copolymerization of styrene onto DPNR was performed in latex stage using tert-butyl hydroperoxide (TBHPO) and tetraethylene pentamine (TEPA) as redox initiator. The mechanical properties were measured by tensile test and the viscoelastic properties of the resulting graft copolymers at wide range of temperature and frequency were investigated. It was found that the tensile strength depends on the grafted polystyrene; meanwhile the dynamic mechanical properties of the modification of DPNR meaningfully improved with the increasing of both homopolystyrene and grafted polystyrene compared to DPNR. The dynamic mechanical properties of graft copolymer over a large time scale were studied by constructing the master curves. The value of bT has been used to prove the energetic and entropic elasticity of the graft copolymer.

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Morphology and Mechanical Properties of NiZn Ferrite/Thermoplastic Natural Rubber Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.925.308 ◽

2014 ◽

Vol 925 ◽

pp. 308-312 ◽

Cited By ~ 1

Author(s):

Mou'ad A. Tarawneh ◽

Sahrim Haji Ahmad ◽

Yu Li Jiun ◽

Radwan Dweiri ◽

Ibrahim N. Hassan

Keyword(s):

Mechanical Properties ◽

Natural Rubber ◽

Mechanical Test ◽

Polymer Nanocomposite ◽

Dynamic Mechanical Properties ◽

Filler Loading ◽

Rubber Matrix ◽

Dynamic Mechanical ◽

Blending Method ◽

Thermoplastic Natural Rubber

In this paper the polymer nanocomposite of nickel zinc (NiZn) ferrite nanoparticles incorporated into the thermoplastic natural rubber nanocomposite (TPNR) were prepared via melt blending method. The effect of different NiZn loading (2-10 wt%) on morphology, tensile and dynamic mechanical properties of the obtained composites was investigated. It was found that NiZn ferrite is well dispersed in the thermoplastic natural rubber matrix. The tensile results indicated that filler loading has improved the tensile strength and Youngs modulus of the nanocomposite. However, the elongation at break decreased with increasing the percentage of NiZn. Dynamic mechanical test showed that the highest storage modulus is at 8 wt% filler. Any further increment of the filler content leads to the formation of agglomerate hence affecting the properties. The Scanning electron micrograph (SEM) micrographs reveal aspect ratio and filler orientation in the TPNR matrix also strongly promoted interfacial adhesion between the filler and the matrix to control its properties.

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