Grafting styrene

When these polymers are subjected to light of A = 365 nm in bulk vinyl monomer, (MMA or styrene) grafted or extensive crosslinking polymers were produced. The photografting or photocrosslinking occurs through the macro-radicals photochemically generated on the backbone of the polymer ... 

The structure of PP-g-polystyrene was studied by wide and narrow angle x-ray diffractometry. The polystyrene component formed discrete amorphous structures, which were identified after chloromethylation [143]. Structure of Rayon-Styrene graft copolymer was characterized by IR, wide angle x-ray, and SEM, grafting occurred mainly in the amorphous regions of rayon [1441. 

Table II. NMR Analysis of Poly(Dimethyl Siloxane) Content in Styrenic Graft and Block Copolymers...

ESCA analysis showed a similar trend of incomplete surface coverage for the IK systems. Also, no domains were visible in any of the IK styrenic graft systems by TEM. There is an expected trend with respect to solubility parameter, p(t-butyl styrene) (6 s 8.1) has a solubility parameter much closer to that of polydimethylsiloxane (S a 7.3) than does p(p-methyl styrene) which is closer than p(styrene) (S s 9.1). 

Figure 32 Grafting mechanisms in styrenic graft copolymers.

DENDRIGRAFT (ARBORESCENT)-POLY(STYRENE)-GRAFT-POLY(ISOPRENE) COPOLYMERS... 

MBS (methyl methacrylate-butadiene-styrene) graft copolymers are known as one of the most efficient non-reactive impact modifiers for PET and also poly(vinyl chloride) (PVC). MBS is used commercially as an effective impact modifier for PET recyclate [27], Typical MBS rubber particles contain an elastomeric core of... 

MBS (poly(methyl methacrylate)-g-poly(butadiene/styrene) graft copolymer) Paraloid EXL Rohm Haas... 

In Table III the specific conductance and electro-osmotic coefficient (3) for the SPS membrane are shown together with the data for a conventional ion-exchange membrane, AMF C103 (16,17) (polyethylene-styrene graft copolymer containing sulphonic acid groups). It appears that there is a close similarity in properties of both membranes. ... 

Fig. 12.1.1 Dependence of order parameter, S. of the secondary polymer, spin-labeled poly (methyl methacrylate) (PMMA) and polystyrene (PST), bound to poly(maleic anhydride—styrene )-grafted silica on hexane content in ethyl acetate-hexane cosolvent. Numbers in parentheses are number average molecular weight of the secondary polymer. (From Ref. 48.)...

We found also that the amino-content of the polyamine-styrene graft copolymer, SAX (x is the polyamine content in wt.%) correlates closely with the adsorption behavior of FN or VN as it also does with the adhesivity of bovine aortic endo-thelial cells to the SA copolymer surface, as will be discussed in Sect. 4.4. 

Schultz (7) has studied the methyl methacrylate polymerization, which is interesting to compare with effects noted in the poly (vinyl chloride)-styrene graft polymerization. When his polymerizations were carried out well below the glassy transition temperature, the conversions reached limiting values. Monomer present in the system functioned as a plasticizing agent, allowing polymerization to occur up to the point... 

Table I. Fractionation of PVC-Styrene Graft Copolymer by Extraction...

ESR Studies of Wool in Styrene Grafting Solution. The variation of free radical concentration of wool irradiated in styrene-dioxane contain-... 

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