Study Of Filling Master Batch Modified Polyolefin

Polyolefin plastic is wildly used as a general-purpose plastics since the advent of it ispublished because of large output, low price and good processing performance, butmechanical properties, aging resistance and heat resistance of polyolefin plastic are lowercompare with engineering plastic, so it is the hot spot that engineering the general-purposeplastics and widening the application of polyolefin plastic in modified plastics industry atpresent. Adding a certain percentage of filler master batch which is made of inorganic filler into plastic products in forming process not only can significantly improve the processingproperties and use performance of plastics, but also reduce costs, save resin and energy,improve the productivity of plastic products.Wollastonite, barium sulfate filling modified polyolefin resin is researched, and thepreparation method of filler master batch and the technological process of filler master batchmodified polyolefin resin are introduced in this paper. The influence which the compatilizercontent affect the dispersion of Inorganic filler in the polyolefin resin is systematic researchedby testing mechanical properties of the samples of compatilizer contrast groups. Based on thedata analysis of mechanical properties, DSC crystallization and contractility of the modifiedpolyolefin sample, the influence which content of inorganic filler affect mechanical properties,crystallization behavior and molding shrinkage ratio of modified polyolefin. The conclusionsare as follows：1. By analyzing impact cross section and the data of mechanical properties of thecompatilizer contrast sample, it is found that the mechanical properties of each sample arebest when25%compatilizer added, at the same time; master batch particles have the mostuniform dispersion and minimum size.2. With the increase of the content of inorganic mineral, the tensile strength and bendingstrength of PE/wollastonite system get the maximum separately when40%and30% wollastonite fill amount, and the notch impact strength is decreased; the bending strength andnotched impact strength of PP/wollastonite system get the maximum separately when30%and40%wollastonite fill amount, and the tensile strength is decreased; the tensile strengthand bending strength of PE/barium sulfate system get the maximum when30%wollastonitefill amount, and the notched impact strength is decreased; the tensile strength of PP/bariumsulfate system gets the maximum when30%wollastonite fill amount, the notched impactstrength and bending strength get the maximum when40%wollastonite fill amount. Theelongation at break of each system is decreased, but bending modulus is increased.3. With the increase of the content of inorganic mineral, the super cooling degree andcrystallization total rate of this three system include PE/wollastonite, PP/wollastonited andPE/barium sulfate are decreased. Although crystallization total rate of PP/barium sulfatesystem sample is decreased, crystallization temperature starts to decreased too. Thecrystallinity of PE system shows a trend of decrease, the crystallinity of PP system increases.4. Shrinkage rate of each system include PE/wollastonite, PP/wollastonite, PE\bariumsulfate and PP/barium sulfate are decreased with the increase of inorganic mineral content.