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With the poly (ethylene terephthalate) (poly (ethylene terephthalate, PET), the rapid growth in the amount of the amount of waste PET (RPET) are increased at substantially the same speed in the packaging field. RPET recycling has become energy important issue of emission reduction, waste resource based rPET still has high rigidity, high heat resistance and chemical stability, excellent performance, at home and abroad in recent years increasing attention to it as engineering plastics used in research and development work on rPET modified especially and mainly relied on imports for engineering plastics consumed in large quantity of rPET engineering plastics, the more important economic and social significance. rPET engineering plastics technology to solve the two aspects of the scientific and technical issues: First, toughening; Second, to improve the crystallization behavior, so that it can be in the lower mold temperature molding processability. research work has been great progress, but there how the toughness is greatly improved while the rigidity (the tensile yield stress, flexural modulus ) does not decrease or also significantly increased the scientific and technical issues to be resolved in order to make the developed waste PET based engineering plastics exhibit toughness, rigidity, are excellent performance, the present work is proposed should have structural characteristics of the idea of: the introduction of energy The strength and toughness of component to improve the toughness and to be able to improve the rigidity of the rigid component; the obdurability component containing both chemical reaction with the surface of the rigid component is a functional group that can react chemically with rPET; by self-assembly, toughness component can be enriched in the the rPET rigid component interface region, to form a combination of high strength, moderate flexible interface. Based on this, the present work a high-density polyethylene, styrene-butadiene elastomers, ethylene-propylene elastomers, epoxy functional group-containing crosslinking agent (C) and the auxiliary crosslinking agent (expressed as S), etc., as main raw materials, the use of \-MFMB), the R-MFMB and rPET, of glass fiber (GF), thermal mechanical reactive blending to prepare a consolidated excellent mechanical properties of waste PET-based engineering plastic (rPET / R-MFMB / GF composite material). hierarchical extraction, IR, TEM, PLM, mechanical properties of analytical techniques and equipment of the R-MFMB chemical structure and composition of the melt flow and the chemical structure of the composite, morphology, crystal morphology, mechanical properties, the melt fluidity characterized by the following main results and conclusions: (1) R-MFMB by unreacted HDPE, elastomers, HDPE macromolecules / elastomer macromolecules with two bridging agent graft copolymer HDPE macromer / elastic body macromolecules by the bridge of the bridging agent, the chain connection of the graft copolymer, HDPE macromer / elastomer macromolecules cross-linked copolymer chain connected by the bridge of the bridging agent, and two types of bridging agent homopolymerization, copolymer composition (2) With the increase of the proportion of the crosslinking agent containing epoxy functional groups in the preparation of the R-MFMB, the content of the epoxy functional groups of R-MFMB in Tc gradually increases, the bridging agent apparent conversion rate Ta first increases and then decreases; increase in the total amount of the two cross-linking agent the R-MFMB in epoxy functional group content of Tc gradually increases, Ta gradually reduce the apparent conversion rate of cross-linking agent. (3 ) With the improvement of the content of R-MFMB the rPET / R-MFMB Izod notched impact strength has increased significantly; flexural modulus and tensile yield stress decreased slightly. With Preparation R-MFMB, epoxy-containing functional group increase in the proportion of cross-linking agent, the rPET / R-MFMB Izod notched impact strength, flexural modulus and tensile yield stress are increased at first then decreased; increased use of the two bridging agent, rPET/R- notched Izod impact strength of MFMB greatly improved, while the flexural modulus and tensile yield stress decreased slightly. (4) rPET / R-MFMB / GF composite material the R-MFMB contains epoxy functional groups, both rPET end -OH,-COOH occurrence of a chemical reaction, with the the GF surface of-NH 2 of a chemical reaction; R-MFMB enriched in rPET with GF interface region, forming a combination of high strength moderate flexible interface. (5) With the increase of the R-MFMB content the rPET / R-MFMB / GF composite mechanical properties first and then decreased with increasing GF content, rPET / R-MFMB / GF composites comprehensive mechanical properties gradually increased. the composition 55/15/30's the rPET / R MFMB / GF composite Izod notched impact strength, flexural modulus, tensile yield stress reach 6.65kJ / m 2 , 7.04GPa, 98.2MPa, raise raw material the rPET of 3.52 times, 3.21 times and 2.43 times.
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