ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Copolymerization of 3-buten-2-one (MVK) and 3-methyl-3-buten-2-one (MIPK) with allylbenzene (AB) in the presence of zinc chloride (ZnCl2) was studied. The apparent monomer reactivity ratio decreased with an increasing concentration of ZnCl2 added. By assuming a terpolymerization system as free vinyl ketone (M1), vinyl ketone complexed with ZnCl2 (M2), and AB(M3), the absolute monomer reactivity ratios were determined by using the least squares method: k11/k12 = 0.0038, k11/k13 = 11.77, k22/k21 = 1.37, and k22/k23 = 3.77 for the MVK-AB system, and k11/k12 = 0.0070, k11/k13 = 55.47, k22/k21 = 1.84, and k22/k23 = 11.16 for the MIPK-AB system, respectively. It is seen from these values that the complexed vinyl ketones are more reactive to both polymer radicals which have free and complexed vinyl ketone units at its terminal position than the free vinyl ketones. Q and e values for MVK and MIPK complexed with ZnCl2 were found to be Q(MVK)2ZnCl2 = 850, e(MVK)2ZnCl2 = 2.97, Q(MIPK)2ZnCl2 = 644, and e(MIPK)2ZnCl2 = 2.62, respectively.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1985.170230801
