Graft Grafting

Type Concn., % Dose Rate, rads/hr. Dose, megarads Graft, % Grafting Rate, %/megarad... 

Percent "Graft" Grafting Efficiency MnxlO-- AGU per Grafted Side Chain... 

Figure 2 shows the effect of reaction time on percent "graft." Grafting increased initially and then leveled off before six hours. Since there is a large excess of acrylic acid available even after the longer reaction times, this leveling off is presumably due to catalyst exhaustion. A six hour reaction time was used for the remaining experiments. 

Grafting Procedure and Calculation of Percent Grafting. Graft copolymerisation treatment of KPM rayon yarn and jute fiber were carried out in a well stoppered, Erlenmeyar flask. Fifty millimeter CAS solution of known concentration was kept at a desired temperature. One millimeter MMA was added following immediately by 1.0 gm of KPM rayon yarn, after which the contents were stirred intermittently. After the end of the reaction, the flask were removed from the thermostat and methanol was immediately added. 

Tables VII and VIII and Figure 11 show the effect of reaction time on the percent grafting, grafting efficiency, and molecular weight of the grafted chains for BPO and AIBN systems.

No. [AIBN] mol/1 x 10-2 Percent Grafting Grafting Efficiency % Molecular Weight Mh x 10 ... 

Starch type Acetone Graft Graft Tensile Elongation, Tear... 

These rubbers are most effective as impact modifiers if they are grafted to the polystyrene rigid phase. Hydrogen abstraction at the allylic site by an alkoxy radical from the peroxide initiator and subsequent reaction with a growing polystyrene or SAN chain produces the graft Grafting is important for particle sizing, but first, phase inversion must be discussed. 

Table I. Composition of Grafted and Non-Grafted SANa Conversion AN in AN in Degree, Non-Grafted Grafted Experiment Initiatorb % SAN, % SAN, % Rc...

Vasctilar grafts Grafts to replace segments of diseased vessels. 

TABLE 3 The effect of methylene bis-acrylamide (MBA) concentration on the percentage of grafting, grafting efficiency and weight conversion at constant conditions (6% Gelatin, 5% AM, 0.05% APS/0.03% at 35 C, overnight... 

Reaction time hr Total conversion % Per cent grafting % Graft efficiency % M X n Grafted PSt 10 Nongrafted PSt No. of nitro groups per branch No. of branches per trunk polymer... 

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