| DuPont Dow chemical company developed the POE with confined geometry configuration catalyst technology (CGCT) and INSITE technology, and this kind of new-type thermoplastic polyolefin elastomers had controlled structures and excellent mechanical properties and weather resistance and processability. Using POE (Engage 8150) as selected materials, the effects of vulcanization and the relationship between molecular structures and properties of POE were studied.The aims of crosslinking were to enhance the endure-heat temperature and to decrease the elongation set of POE. The influences of the DCP content as a curing agent on mechanical properties, crystalline, morphologies were discussed, In the DCP crosslinking system, the mechanical properties of POE were decreased sharply. In order to enhance the tensile strength of POE, vulcanized POE must be reinforced.Firstly reinforcing effect of the common fillers on POE vulcanizates was studied. Silica, Carbon black (N330) and Carbon black (N660) were selected as the reinforcements. In order to increase the compatibility between elastomer POE and Silica, POE-g-MAH was used. Firstly, when the reinforcements were fixed, the influence of the content of DCP as a curing agent on mechanical properties was discussed. The experiment showed the best DCP content in the vulcanizing systems. Secondly, when the content of DCP was fixed, the effect of the content of silica and carbon black on mechanical properties, crystalline, morphologies of the vulcanized POE was studied. The results showed that the mechanical properties of the vulcanized POE increased quickly after using the reinforcements. Among the three reinforcing agents, carbon black (N330) had the best reinforcing effect.In this paper the application of in situ preparation in the rubber industry was adopted in the vulcanizing systems of POE. Zinc dimethacrylate (ZDMA) was in-situ prepared with ZnO and methacrylicacid (MAA) and used to strengthen the crosslinking system.There were two ways in the formation of ZDMA particle which reached superfine-scale in this experiment.In the first way, Zinc dimethacrylate (ZDMA) particle was adopted in crosslinking POE. Most of the dimensions of particles was smaller gradually and formed Zinc dimethacrylate (ZDMA) particle in superfine-scale. Finally there were a mass of particles which reached micron in the composite, so the composite was reinforced. The experimental results showed that when 30 phr of ZDMA was used, the tensile strength reached the maximum, but the effect of reinforcement was not as good as Carbon black (N330).For the second, Zinc dimethacrylate (ZDMA) was in-situ prepared with ZnO and methacrylicacid (MAA). Peroxide radicals initiated ZDMA radicals and PZDMA which was in-situ prepared and reached micron-scale. It could form ionici cross bond in crosslinking POE. The crosslinking degree was enhanced when PZDMA was used as a reinforcement. In addition, there were possibly chemical graft and physical attraction between the particle of micron structure and POE. The effects of molar ratio of ZnO and methacrylic acid (MAA), content of dicumyl peroxide (DCP), ZDMA and Carbon black on the properties of POE were investigated. The experimental results showed that when ZDMA content was 30 phr and the molar ratio of ZnO and methacrylicacid (MAA) which had an optimum account was 1.25, the properties of curing POE were best. Using Carbon black at the same time, POE was greatly reinforced. When the content of carbon was 20 phr, the tensile strength of POE was 30.8 MPa. |
