EPDM-graft-PMMA

EPDM-g-PMMA was produced through ATRP with CuBr/bipyridine [80]. The graft copolymer, which had an ethylene-propylene terpolymer (EPDM) backbone and PMMA branches, was prepared from brominated EPDM that was produced with NBS to introduce allylbromine moiety on the backbone. Resulting EPDM-g-PMMA graft copolymers were characterized by solvent extraction, infrared (IR), and NMR techniques. 

Scheme 13 Grafting of PMMA onto brominated EPDM via well-known ATRP mechanism...

PE with EVAc, CPE, BR, etc., have been chemically foamed at T = 150-210°C 5 to 95 wt% of LDPE or LLDPE with EAA PE with either poly(ethylene-co-vinylcarboxylate) or an acrylate PP with an ionomer and EBA-GMA PP with an ionomer, EBA-GMA and EPDM PO with a core-shell graft copolymer MBS-type PP with acidified-PP, or a carboxylic acid-modified EPR, SMM-MA, and either EMMA-GMA or EVAc-GMA LLDPE, PMMA and SEBS, EPR, or ethylene-styrene block copolymer (ES)... 

Blends of PET/HDPE have been treated previously in the literature [157, 158]. These are immiscible, but the addition of compatibilizers improves the mechanical properties of the blend, such as styrene-ethylene/butylene-styrene (SEBS) and ethylene propylene diene monomer (EPDM) [157], MAH [158], Poly(ethylene-stat-glycidyl metha-crylate)-graft-poly(acrilonitrile-stat-styrene) (EGMA), poly (ethylene acrylic acid), and maleated copolymers of SEBS, HDPE, ethylene-propylene copolymer (EP). The addition of compatibilizers modifies the rheological properties of blends of PET with HDPE, in such a way that increases in viscosity are observed as the component interactions augment. Changes in crystallization of PET were evaluated in blends with Polyphenylene sulfide (PPS), PMMA, HDPE aromatic polyamides, and copolyesters [159]. 

Ramar and Alagar [31] compared the dielectric strengths of nanoclay reinforced blends of ethylene-propylene-diene monomer grafted with fris(2-methoxyethoxy)vinylsilane (EPDM-g-TMEVS) and EPDM-g-TMEVS/PMMA blends. The values of dielectric strength, volume resistivity, surface resistivity and arc resistance were all increased with increasing concentration of EPDM-g-TMEVS because of the presence of Si-O-Si linkages. The blends filled with nanoclay showed improved dielectric properties because of the presence of the inorganic moiety. 

Graft copolymer EPDM-PMMA Slewing A, Schierholz J, Braun D, separated from PMMA. HeUmann G, Pasch H [51]... 

Problem 11.18 Dienes commonly used in EPDM rubbers include dicyclopentadiene, 4-ethylidene norborn-2-ene, and hexa-1,4-diene. Devise a strategy to prepare (via ATRP and grafting from approach) graft copolymers containing EPDM backbone chains and PMMA branches, the diene used in the EPDM being ethylidene norbornene. 

Figure 11.28 Synthesis of graft copolymers made of EPDM rubber backbone and PMMA branches, using ATRP procedure and grafting from approach, the diene of the EPDM rubber being 4-ethylidene norbom-2-ene. (Adapted from Wang et al., 1999.)...

Using the grafting reaction not only MA, but other compounds may also couple to the polymer chain. For the sake of better compatibility, the most commonly prepared structures are the following PP-g-MA, FfDPE-g-MA, HDPE-g-MA, ethylene propylene diene monomer (EPDM)-g-MA, PS-g-MA, PP-g-PS or PC-g-PMMA [64, 65]. 

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