Impact methacrylate copolymer

In addition to acting as impact modifiers a number of polymeric additives may be considered as processing aids. These have similar chemical constitutions to the impact modifiers and include ABS, MBS, chlorinated polyethylene, acrylate-methacrylate copolymers and EVA-PVC grafts. Such materials are more compatible with the PVC and are primarily included to ensure more uniform flow and hence improve surface finish. They may also increase gelation rates. In the case of the compatible MBS polymers they have the special function already mentioned of balancing the refractive indices of the continuous and disperse phases of impact-modified compound. [Pg.342]

Non-reactive impact modifier (copolymer of ethylene and methyl acrylate). b Reactive impact modifier (terpolymer of ethylene, methyl acrylate and glycidyl methacrylate). c Interparticle distance, i.e. the average distance between particles of impact modifier in the PET matrix. [Pg.515]

However, a reactive styrene acrylonitrile copolymer (SAN)/gly-cidl methacrylate copolymer was found to be an effective reactive compatibilizer for the blends. Ethyltriphenyl phosphonium bromide was used as the catalyst. Probably, the epoxide groups react either with carboxyl or with hydroxyl groups of the PLLA end groups. This so modified polymer acts as the compatibilizer. Compatibilized PLLA/ABS blends exhibit an improved impact strength and an im-... [Pg.223]

Since these rubber particles are highly filled with a homopolymer or a copolymer, the rubber is already reinforced with a resin to give a higher modulus particle than the grafted rubber latex. On the basis of the uniqueness of these rubber particles, this process is also more appropriate in manufacturing high-strength medium-impact ABS polymer (31), or rubber-reinforced styrene-methyl methacrylate copolymer (32). The... [Pg.99]

Transparent, Impact-Resistant, Styrene/ Methyl Methacrylate Copolymer Grafted onto Polybutadiene... [Pg.266]

PPE-MA with PP-MA, SBR, glycidyl methacrylate copolymer and/or phenylenediamine binder solvent resistance, moldability, impact and mechanical properties Togo etal., 1988... [Pg.62]

S-MMAIPC blend. This blend (Novacor SD-9101) was reported to have better flow, surface finish and scratch resistance than PC/polyester blends and an equivalent level of impact toughness (Table 15.24). It is believed that these formulations also include some acrylic rubber (core-shell type) for impact modification. One would expect a sufficient level of partial miscibility for self-compatibilization between the styrene-methyl methacrylate copolymer (S-MMA) and the polycarbonate especially at high MMA content of the copolymer, since the binary blends of PMMA... [Pg.1086]

Styrene-butadiene copolymers are often blended with other polymers. Transparent blends can be made with styrene, styrene-acrylonltrlle copolymers, or styrene-methyl methacrylate copolymers. Blends with styrene have low impact strength even at low styrene levels, while blends with styrene-methyl methacrylate copolymers can have greatly Improved impact strength. Blends with high impact polystyrene, polypropylene, and polycarbonate are opaque. [Pg.136]

Methyl methacrylate has been copolymerized with a wide variety of other monomers, such as acrylates, acrylonitrile, styrene, and butadiene. Copolymerization with styrene gives a material with improved melt-flow characteristics. Copolymerization with either butadiene or acrylonitrile, or blending PMMA with SBR, improves impact resistance. Butadiene-methyl methacrylate copolymer has been used in paper and board finishes. [Pg.426]

Glycidyl methacrylate copolymers Ethylene/butyl acrylate/maleic anhydride copolymers Styrene/ethylene-butylene/styrene block copolymer Poly(amide) (PA), MgO Silicone rubber and aminosilane Liquid crystalline polymers Improved impact strength Improved impact strength" Improved impact strength Improved electrical properties, in glass fiber applications" Improved mechanical properties" Viscosity reduction" ... [Pg.184]

PolyCphenylene sulfide) exhibits a low impact strength and hence is brittle. Attempts to improve the impact strength go back to 1983, when ethyl-ene/glycidyl methacrylate copolymers were incorporated into PPS as impact modifiers. However, the adhesion of impact modifiers to PPS at the interface is not satisfactory, and an improvement was suggested in the treatment of the PPS by aqueous acid before use, to improve the adhesion properties. ... [Pg.184]

Glycidyl methacrylate copolymers Improved impact strength [41-43]... [Pg.134]

Blends of styrenic pol5m ers (PS, high impact poly (styrene)) and biodegradable polymers (PLA) can be extruded and thermo-formed to produce very low density food service and consumer foam articles (29,31). The blends are compatibilized with styrene-based copolymers a styrene-maleic anhydride copol5mier, or a styrene methyl methacrylate copolymer. As blowing agent for foaming the compositions z-pentane is used. [Pg.214]

Commercial impact-modified acrylic resins (Table 19.15) exhibit five- to tenfold improvement in the notched Izod impact strength and the ultimate tensile elongation compared to the neat PMMA resin. These impact-modified acrylics are usually blended captively by the manufacturers of the acrylic resins. The base resin in a typical weatherable grade (Plexiglas DR, Rohm and Haas) could be a methyl methacrylate copolymer with ethylacrylate and styrene, while the rubber additive (ca. 10 %) could be an emulsion-polymerized, PMMA-grafted, cross-linked poly (n-butylacrylate) rubber of controlled particle size (<200 nm). The nonweatherable impact-modified acrylic (XT, CYRO) typically consists of a MMA/S/AN copolymer with MBS (ca. 10 %) rubber particle dispersions. [Pg.1786]

More recently, a polyarylate-polyamide blend with improved chemical, stress-crack resistance is commercially offered (AX1500, Unitika). Due to the inherent immiscibUity of polyarylate with polyamide, the blend is opacpie and the notched Izod impact is somewhat sacrificed (Table 19.36). Compatibihty in polyarylate-PA6 blends could be achieved through addition of < 10 % of a reactive ethylene copolymer such as ethylene-glycidyl methacrylate copolymer (Okamoto et al. 1989). [Pg.1853]

K. Kircher and R. Pieper, Polyurethane-Polymethyl methacrylate Copolymers, Kunststoffe 68(3), 141 (1978). SINs of PU and PMMA are described. Moldings were prepared. Swellability flexural strength, impact strength, and surface hardness were determined. [Pg.251]

PBT EGMA Ethylene-glycidyl methacrylate copolymer addition to PBT increased izod impact 16 times at 20 wt% EGMA. Interparticle distance was noted to be controlling factor. 46... [Pg.343]