Study On Preparing And Ageing Of Polymer Matrix Compound Made Of Wastes (PMCMW)

Polymer Matrix Composites Made of Wastes (PMCMW) is the important component of compound material, and its unique part is that more than 95% of its raw material is wastes . In our country, its preparing technology and application study are one of the emphatic domains in "the society-development plan of science and technology". This paper firstly is directed against the matrix of PMCMW -the low density polyethylene ( LDPE ) film , to carried on the ageing experiments and figuring, and then to prepare the thermoplastic PMCMW with these wastes LDPE films as the matrix and the industrial residues as the strengthened material ,and carried on the ageing the stability experiment .What's more, for the industrial dust, to study with the Unsaturated Polyester (UP) resin serve as the matrix, and at the same time added the glass fiber as the fillers and the curing agent etc. to make the thermosetting compound material, then to test the intensity of this compound. The major conclusions are as these follows:1 . Taking a sample of LDPE film in period after it had been the progress of the atmosphere ageing , the man-made acceleration ageing with xenon lamp and high temperature ageing, then measure the pulling intensity of LDPE film and the percentage of rupture elongation, the discovery is that at the initial stage of the film weathering, pulling intensity and the percentage of rupture elongation all result in the increase first and reducing then. The spectrum analyses of infrared Spectroscopy's clearly shows Characteristics such as the scission of the molecule chain, and the weak oxygenation. The characteristics after man-made accelerated ageing with xenon lamp and thermal ageing shows the later stage of LDPE ageing: the LDPE molecule chain had ruptured and branching, which made it easier for oxygen's attack, the film's color changed and it became fragile, the fracture strength and the elongation at break descend quickly etc. And from DSC and TG's curve shows that with the further ageing of film, the melt point and the heat decomposition temperature of LDPE constantly descended, the heat stability becomes worse and worse.The figuring of LDPE ageing can be made by some ways. Amid the ways, the spectrum analyses of infrared Spectroscopy is one of the best ones, which can clearly shows the characteristics of the LDPE ageing: scission, branching and oxygenation ;on the other hand, at the later ageing of LDPE film, the figuring of LDPE ageing can be made by the parameter of the fracture, the elongation at break and the melt point etc.By way of above experiment and law, we can find that after 4 months weathering, the characteristics of LDPE film is not serious, the film is only be the primary stage of the ageing, it absolutely can be the matrix of the thermoplastic PMCMW.2. Purchase some waste LDPE films which were used less than half a year as the thermoplastic PMCMW matrix, after fell to pieces , the LDPE film is mixed with industry solid sand , squeeze out of the screw-type extruder to make the thermoplastic PMCMW , tested the bending strength of the thermoplastic PMCMW. It find that when the sand molar percent is within 60%, the bending strength of this compound material can reach more than the 20Mp, but when the sand molar percent increases, the material bending strength descends. Then the thermoplastic PMCMW t carries on the heat ageing and man-made acceleration ageing with xenon lamp. It finds that the temperature can raise the intensity of material to a limited degree, but if the temperature of the ageing is 80 degrees, the ageing time should within 9 days and if the temperature of the ageing is 60 degrees, the ageing time should within 2 weeks. The xenon lamp accelerated ageing experiment can make material intensity descend quickly, and within the 50% of sand molar percent, the more sand molar percent can mark down the speed of ageing.3. Add the antiager 1 and antiager 2 to the thermoplastic PMCMW which the ratio of sand and matrix is 1/1 .On the one hand, the antiager 1 and antiager 2 can serve as a kind of pigment...