Miscibility of self-vulcanizable rubber blend based on epoxidized natural rubber and chlorosulphonated polyethylene: effect of blend composition, epoxy content of epoxidized natural rubber and reinforcing black filler

Abstract Dynamic mechanical analyses and differential scanning calorimetry studies show that the miscibility of a self-vulcanized blend of epoxidized natural rubber (ENR) and chlorosulphonated polyethylene (Hypalon) depends on the blend composition as well as the level of epoxidation in ENR. It has been found that ENR with 25 mol% epoxidation (ENR-25) forms completely miscible blends with Hypalon at all blend ratios. However, in the case of ENR with 50 mol% epoxidation (ENR-50), miscibility of the blend depends on blend composition. At lower ENR-50 loading the blend is immiscible, but at higher ENR-50 loading (i.e. 75 25 ENR -50 Hypalon ) the blend becomes miscible. Miscibility is found to be unaffected by reinforcing black filler at 20 wt% loading.

[1]  P. Smit.  The glass transition in carbon black reinforced rubber , 1966 .

[2]  J. Brennan,et al.  Carbon black–polymer interaction: A measure of reinforcement , 1964 .

[3]  J. W. Barlow,et al.  Polycarbonate blends with styrene/acrylonitrile copolymers , 1984 .

[4]  A VOET,et al.  Dielectrics and rheology of non-aqueous dispersions. , 1947, The Journal of physical and colloid chemistry.

[5]  A. R. Payne,et al.  Reinforcement of rubber with carbon black , 1970 .

[6]  N. Yoshimura,et al.  Structure of Vulcanized and Unvulcanized SBR/BR Blends , 1969 .

[7]  G. Nando,et al.  Miscible blends from rigid poly(vinyl chloride) and epoxidized natural rubber , 1988 .

[8]  Guoren He,et al.  The dynamic mechanical behaviour of blends of polyphenylene sulfide with acetylene terminated sulfone , 1986 .

[9]  J. Kallitsis,et al.  Miscibility of chlorinated polymers with epoxidized natural rubber: 3. Blends with chlorinated polyethylenes , 1987 .

[10]  Avrom I. Medalia,et al.  Morphology of aggregates—II. Size and shape factors of carbon black aggregates from electron microscopy , 1969 .

[11]  T. Fox.  Influence of Diluent and of Copolymer Composition on the Glass Temperature of a Poly-mer System , 1956 .

[12]  T. K. Chaki,et al.  Self-vulcanizable rubber blend system based on epoxidized natural rubber and Hypalon , 1990 .

[13]  D. Feldman,et al.  Modification of epoxy polymer by plasticizing, blending, or reinforcing , 1984 .

[14]  S. De,et al.  Self-vulcanizable rubber blend system based on epoxidized natural rubber and chlorosulphonated polyethylene , 1990 .

[15]  S. De,et al.  Epoxidized natural rubber-carboxylated nitrile rubber blend : a self-vulcanizable miscible blend system , 1990 .

[16]  K. Grosch.  The effect of a low‐viscosity swelling liquid on the tensile strength of rubber , 1968 .

[17]  Lawrence E. Nielsen,et al.  Dynamic mechanical properties of particulate‐filled composites , 1970 .

[18]  F. E. Karasz,et al.  Dynamic mechanical behavior of filled polyethylenes and model composites , 1982 .

[19]  P. Corish.  Fundamental Studies of Rubber Blends , 1967 .

[20]  A. Medalia.  Filler Aggregates and Their Effect on Reinforcement , 1974 .

[21]  A. Medalia.  Morphology of aggregates: VI. Effective volume of aggregates of carbon black from electron microscopy; Application to vehicle absorption and to die swell of filled rubber , 1970 .

[22]  G. Kraus.  A structure — concentration equivalence principle in carbon black reinforcement of elastomers , 1970 .

[23]  W. M. Hess,et al.  Carbon Black Morphology: I. Particle Microstructure. II. Automated EM Analysis of Aggregate Size and Shape , 1969 .

[24]  S. De,et al.  Self-vulcanizable rubber blend system based on epoxidized natural rubber and carboxylated nitrile rubber , 1989 .