Mechanical properties of organomodified kaolin/natural rubber vulcanizates

Phosphorylated Cashew Nut Shell Liquid prepolymer modified kaolin as a reinforcing filler for natural rubber

“…Rugmini and Menon (2008) have reported the synthesis and characterization of organomodified kaolins using sodium salt of Rubber Seed Oil (SRSO) and their suitability as reinforcing fillers in NR at very low dosages. In a related study, Yahaya et al (2009) have reported that at concentrations less than 10 phr, kaolin modified with SRSO improves the tensile and tear properties, chemical crosslink density index and resistance to solvent swelling of NR vulcanizates. Also, Yahaya et al (2012) have observed considerable improvements in tensile properties and tear strength of NR vulcanizates containing 5 phr of kaolin modified with sodium salt of tea seed oil.…”

“…The crosslink density index of the vulcanizates was measured by equilibrium swelling method after immersion in toluene for 48 h as reported by Yahaya et al (2009).…”

Intercalation and Exfoliation of Kaolinite with Sodium Dodecyl Sulfate

“…The layered silicates used in rubbers can increase mechanical properties, improve thermal resistance and reduce gas permeability [2,5,6]. It is well known that layered silicates with large aspect ratios added in rubber are more beneficial to increase the tortuosity of the diffusive path for the gas molecule, providing excellent barrier properties [2,7,8].…”

“…Kaolinite (Kaol), Al 2 Si 2 O 5 (OH) 4 , is a typical 1:1 layered dioctahedral aluminum silicate, which has been widely used as a filler in rubber [6,[14][15][16][17]. The layers of kaolinite are composed of SiO 4 tetrahedral sheets linked to AlO 2 (OH) 4 octahedral sheets.…”

Estudo comparativo das propriedades de dois caulins brasileiros.

“…Yahaya et al (2009) Frost et al (2002) utilizou acetamida e formamida para modificar a estrutura da argila caulinítica australiana usada em seu trabalho, também obteve aumento no pico da caulinita de 7,14 Ȧ para 10,74 Ȧ com a acetamida e de 7,14 Ȧ para 10,90 Ȧ com a formamida, a intercalação da caulinita com a acetamida e formamida foi acompanhada durante 50 dias e a diferença apresentada no difratograma de raios X foi o aumento da intensidade dos picos e isso é devido à melhora na intercalação da caulinita com a acetamida e a formamida.…”