Effect of the compatibilizer on the morphology and properties of dynamically cured PP/POE/epoxy blends

Abstract

Dynamic vulcanization was successfully applied to epoxy resin reinforced polypropylene (PP)/ethylene-octene copolymer (POE) blends, and the effects of different compatibilizers on the morphology and properties of dynamically cured PP/POE/epoxy blends were studied. The results show that dynamically cured PP/ POE/epoxy blends compatibilized with maleic anhydridegrafted polypropylene (MAH-g-PP) have a three-phase structure consisting of POE and epoxy particles dispersed in the PP continuous phase, and these blends had improved tensile strength and flexural modulus. While using maleic anhydride-grafted POE (MAH-g-POE) as a compatibilizer, the structure of the core-shell complex phase and the PP continuous phase showed that epoxy particles could be embedded in MAH-g-POE in the blends, and gave rise to an increase in impact strength, while retaining a certain strength and modulus. DSC analysis showed that the epoxy particles in the blends compatibilized with MAH-g-PP were more efficient nucleating agents for PP than they were in the blends compatibilized with MAH-g-POE. WAXD analysis shows that compatibilization do not disturb the crystalline structure of PP in the blends.

An epoxy‐ended hyperbranched polymer as a new modifier for toughening and reinforcing in epoxy resin

“…1,2 The toughening of epoxy materials is very important and has long been the focus of many research investigations [3][4][5][6][7] . Toughening of epoxy can be achieved by addition of organic or inorganic fillers, such as liquid carboxyl-terminated copolymer of butadiene acrylonitrile (CTBN), [8][9][10][11] high performance engineering thermoplastic, [12][13][14][15] inorganic particles, [16][17][18][19] and hyperbranched polymers (HBPs). [20][21][22][23] Among the various fillers, hyperbranched polymers are considered as a new category of promising fillers which can improve the toughness and other mechanical properties simultaneously.…”

Role of Cured Epoxy and Block Copolymer Addition in Mechanical and Thermal Properties of Polyethylene

“…Similar results were observed in PP/epoxy blends with different compatibilizers. 6,8 It is also observed in Figure 4(b) and 4(d) that compatibilizer addition improved the homogeneity of epoxy phase distribution when compared with uncomptabilized blends (Figure 4 (a) and Figure 4(b)). Table 4 presents DSC results for compatibilized and uncompatibilized blends.…”

“…There are few works, to the best of our knowledge, about thermoset blends involving epoxy resins and thermoplastics. In general, they studied the compatibilizing effect and the crystallization of thermoplastic matrix, usually polypropylene [4][5][6][7][8][9]10 , after epoxy addition [3][4][5][6][7][8][9][10][11][12] . Overall, after epoxy addition, an increase in crystallinity is observed.…”

“…Since these blends are incompatible, they also observed that the use of a compatibilizer decreased the size of the dispersed phase. Jiang et al [6][7][8][9] , for instance, studied the epoxy addition in polypropylene with maleic anhydride grafted polypropylene as compatibilizer. In this work, the compatibilizer addition decreased the size of dispersed phase and improved phase adhesion.…”

Preparation and sound absorption properties of barium titanate/nitrile butadiene rubber-polyurethane foam composites with stratified structure

“…A lot of work has been done and previously reported by the author on the preparation of organic-inorganic composites and the structure design of sound absorbing materials. [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] Barium titanate/nitrile butadiene rubber (BT/NBR) composite, a kind of common piezoelectric composite, has ne piezoelectric property and relatively higher density. This combination of piezoceramics llers and polymer matrix gives the BT/NBR composite relatively higher airow resistivity which is benecial to reect the sound wave and dissipate the sound energy.…”