Studies on the use of nano zinc oxide and modified silica in NR, CR ...

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Summary and Conclusions Polymers are the most versatile of engineering materials because of their ability to be tailor-made to suit specific requirements. Fillers play a dominant role in modifying the properties of the base polymer and nano fillers are the last name in fillers because of their ability to modify properties at very low levels. The primary objective of this study has been to upgrade the performance of rubbers like natural rubber, polychloroprene rubber, and styrene butadiene rubber by modifying with nano zinc oxide and nano silica. This study may be divided into two parts. The first part of the work is the preparation and use of nano zinc oxide in natural rubber, polychloroprene rubber and styrene butadiene rubber. The second part of the work is the use of surface modified silica particles in natural rubber, polychloroprene rubber, and styrene butadiene rubber. An introduction about various rubbers, their compounding with emphasis on fillers and nano fillers is presented in chapter 1. The use of zinc oxide, antioxidants and various types of silica particles in rubber compounding is presented in detail. The scope and objective of the study are also included in this chapter. The specifications of all the materials used in the study and the details of the different experimental techniques employed in this study are given in chapter 2. The rubber compounds were prepared on a two roll mixing mill as per the ASTM D 3182-89. The cure characteristics of the compounds were studied using a rubber process analyzer. These compounds were compression moulded in an electrically heated hydraulic press. The tensile properties of the vulcanizates were studied using a universal testing machine. The ageing
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Studies on the use
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WxvÄtÜtà|ÉÇ I hereby declare t
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My heartfelt thanks are also due to
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The use of prepared zinc oxides as
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2.2.10 Characterization techniques
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Part@ B 7.3.1 Characterization - su
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Introduction 1.1 Composites 1.1 Com
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Introduction of reinforcement and m
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Nanophase material: They are same a
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Introduction developed at Oxford Un
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Introduction Rubbers are broadly cl
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Introduction The polymers are prepa
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1.4.1 Zinc oxide Introduction Zinc
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Introduction and tinted rubber comp
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Pharmaceutical industry Introductio
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Introduction textiles contain ZnO,
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1.4.2a. Carbon blacks Introduction
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Introduction especially glass and c
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Introduction properties, filler cha
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Introduction coupling agent in sili
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Introduction amphiphilic di and tri
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Introduction It has been reported t
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Introduction The external manifesta
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Introduction concern for a clean en
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12. C.R.Martin, Chem. Mater, 1996,
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41. E.J.Stewart, J.Elastomers plast
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Introduction 69. J.B. Donnet (Ed),
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Introduction 100. C.T.Kresge, M.E.L
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Introduction 129. E.R.Ericsson, R.A
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Chapter 2 47 In a particular experi
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Chapter 2 Stearic acid (co-activato
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Chapter 2 roll with mill opening at
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Chapter 2 were carried out at a cro
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Chapter 2 2.2.4 Strain-sweep studie
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Chapter 2 2.2.6 Bound rubber conten
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Chapter 2 Surface area 59 Surface a
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Preparation and characterization of
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3.2.2 Method I- Precipitation metho
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Energy dispersive X-ray spectrometr
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3.4.9 Differential scanning calorim
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3.6 References Preparation and char
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Use of nano zinc oxide in natural r
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Tear Strength (N/mm) 120 100 80 60
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4.5 References Use of nano zinc oxi
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Chapter 5 oil resistance to oil swe
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Chapter 5 93 Ingredient phr Table 5
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Chapter 5 95 Torque (dNm) 6.5 6.0 5
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Chapter 5 97 Other technological pr
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Chapter 5 99 Table 5.8 Reinforcing
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Chapter 5 101 Hours Table 5.11 Agei
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Chapter 5 5.5 References 103 1. D.C
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Chapter 6 105 Fatty acids as co-act
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Chapter 6 107 Physical properties s
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Chapter 6 The cure rate index of gu
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Chapter 6 show better mechanical pr
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Chapter 6 113 Table 6.6 Reinforcing
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Chapter 6 115 Tensile modulus (Mpa)
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Chapter 6 6.4 Conclusions 117 1. Gu
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Use of antioxidant modified precipi
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Page 139 and 140: Mix Use of antioxidant modified pre
Page 143 and 144: Crosslink density Use of antioxidan
Page 151 and 152: Part@ B Use of antioxidant modified
Page 157 and 158: Thermal ageing studies Use of antio
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Page 167 and 168: Rubber compounding Products from ri
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Page 191 and 192: ASTM : American Society for Testing
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Page 195: P.M.SABURA BEGUM Senior Scale Lectu
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