ELECTROMECHANICAL BEHAVIOR OF NATURAL RUBBER—LIGNOCELLULOSIC MATERIAL COMPOSITES

The mechanical and electrical properties of the natural rubber vulcanizates loaded with lignocellulosic materials were studied. It was found that the stress of vulcanizates decreased with initial fiber loading. Also, it was shown that the presence of fibers and an adhesion system greatly improves the aging resistance of the rubber composites.

The resistivity ρ, dielectric permittivity ?′, and dielectric loss ?″ of the investigated samples were determined in the frequency range 10²–10⁵ Hz at room temperature. It was noticed that ?′ for bagasse pulp (Bp) is higher than that for cotton stalks pulp (Csp), which is attributed to the higher hemilignin content in Bp which is characterized with a low degree of polarization. An abrupt increase of ?″ at a higher content of Bp was noticed.     

MARKET IMPELS QINGDAO TIRE AND RUBBER ENTERPRISES SPEED UP REFORM

Before long, the tire and rubber products in China gave a full play on the international market relying on the remarkable cost and price superiority, and a very considerable profit had been got for tire and rubber enterprises.     

Part Ⅱ REACTIVE DISPERSE DYES CONTAINING β-SULPHATED HYDROXYETHYL SULPHONYL GROUP FOR POLYESTER-COTTON BLENDS

A range of reactive disperse dyes for polyester-cotton blends was devised and applied to the blendfabrics by thermosol process.The fixation of such dyes on the respective fibres of the blend was foundto be in two entirely different manners.     

STUDIES ON THE RELATIONSHIP BETWEEN THE NETWORK STRUCTURE AND THE MECHANICAL PROPERTIES OF RUBBER VULCANIZATES (Ⅰ) THEORY OF ELASTICITY FOR RUBBER VULCANIZATES WITH CARBON BLACK FILLERS IN LARGE DEFORMATION

A model structure formed by the combination of crosslinked, trapped entanglement and carbon black-polymer chain networks has been developed for rubber vulcanizates with carbon black fillers. Based on thisstructure and the proposed mechanism of large deformation, the elastic free energy     

CHINA SYNTHETIC RUBBER INDUSTRY(HECHENG XIANGJIAO GONGYE) Volume 27,No1～6,2004 CONTENTS

MONOMERS3 -1 46　Analysisofbutynesanddimerincimmercialbutadieneforpolymerizatrion　XueHuifeng,LiuMancang5 -2 87　Benchscaletestdevelopmentofloadingmetallocenecatalyst　ZhuYajie,WangZhanlin ,ZhuBochaoGENERALPURPOSESYNTHENTICRUBBERSHomopolymericRubbers1 -0 2 1　Synthesisandcharacterizationoflowrelativemolecularmasstrans 1 ,4 polybutadieneNiHongbo,ShaoHuafeng ,HuangBaochen,YaoWei,ZouXifeng4-2 0 9　Effectofphosphiteesterligandonnickelcatalystsysteminsynthesisofhighcis polyb…     

CHINA SYNTHETIC RUBBER INDUSTRY(HECHENG XIANGJIAO GONGYE) Volume 25,No 1-6,2002 CONTENTS

MONOMERS3—1674—212?︽相似文献   

RICE HUSK ASH FILLED NATURAL RUBBER COMPOUNDS – THE USE OF RHEOMETRIC DATA TO QUALITATIVELY ESTIMATE OPTIMUM FILLER LOADING

White rice husk ash (WRHA) and black rice husk ash (BRHA) were incorporated as filler in natural rubber (NR) compounds. A conventional vulcanization system (CV) was chosen and cure studies were carried out on a TI-100 Curometer at 150, 160, 170 and 180°C. From the rheometric data obtained at 150°C, a specific constant related to the filler structure was evaluated that allowed predictions on how the presence of filler would affect mechanical properties such as tensile and tear resistances, and hardness. Swelling behavior and examination of the fracture surface, which was carried out on a Scanning Electron Microscope (SEM), were used to get some idea on the interaction between the rubber matrix and the filler. WRHA showed a good reinforcing potential for NR compounds and catalytic effect upon vulcanization.     

REACTIVE DISPERSE DYES FOR SYNTHETIC POLYMER FIBRES AND THEIR NATURAL FIBRE BLENDS Part Ⅰ REACTIVE DISPERSE DYES CONTAINING β-HYDROXYETHYL SULPHONYL GROUP FOR POLYAMIDE FIBRES

Reactive disperse dyes of either monoazo or anthraquinone types containing the β-sulphated hydroxy-ethyl sulphonyl group were synthesized and their dyeing properties investigated.These dyes possessed thetriple characteristics of acid,reactive and disperse dyes in dyeing polyamide fibres.The formation ofcovalent bond between the reactive group and nylon fibre was proved and discussed.     

STUDIES ON THE RELATIONSHIP BETWEEN THE NETWORK STRUCTURE AND THE MECHANICAL PROPERTIES OF RUBBER VULCANIZATES (H) THE REINFORCEMENT OF ELASTOMERS BY CARBON BLACK FILLERS AND ITS CHARACTERIZATION

A satisfactory account of reinforcement of rubber through the application of the theory of elasticity forits vulcanizates with carbon black fillers has been obtained. A statistical theory of reinforcement by carbonblack fillers and its characterization was developed. Three methods for     

Taking Advantage of Capital to Promote the Application of Advanced Technologies and Rubber Industry Transform——Rubber Industry Ⅰ& M High -end Forum and 2012 CHINA RUBBER Magazine Annual Conference closed

From September 4 to 6,"Rubber Industry Ⅰ& M High-end Forum and 2012 CHINA RUBBER Magazine Annual Conference" was held in Chengdu, Sichuan Province. Fan Rende, President of CRIA, attended the conference and accepted the interview     

REACTIVE DISPERSE DYES FOR SYNTHETIC POLYMER FIBRES AND THEIR BLENDS WITH NATURAL FIBRE (Ⅲ) THE DYEING MECHANISM OF REACTIVE DISPERSE DYES CONTAINING β-HYDROXYETHYL SULPHONYL SULPHURIC ESTER GROUP FOR POLYESTERCOTTON BLEND

A study on the migration behavior of the reactive disperse dyes containing β-hydroxyethyl sulphonyl sulphuric ester group at different stages of dyeing and thermofixation on the polyester-cotton blend was made. The sublimation and vapor-phase transport of the dyes during thermofixation were examined. It was concluded that thermofixation conditions affect the dye distribution between cotton and polyester in the blend. The relationship between the distribution and the molecular structure of the dyes was examined. A dyeing mechanism of reactive disperse dyes for polyester-cotton blend was suggested.