ISSN:
0323-7648
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The miscibility behavior of ternary poly(vinyl chloride)/poly(n-propyl methacrylate)/poly(n-amyl methacrylate) (PVC/PPMA/PAMA) and poly(vinyl chloride)/poly(n-butyl methacrylate)/poly(n-amyl methacrylate) (PVC/PBMA/PAMA) blends was investigated by differential scanning calorimetry. In both systems, a binary mixture of the two polymethacrylates is totally immiscible (PPMA with PAMA, and PBMA with PAMA). For PVC/PPMA/PAMA blends containing less than 70% PVC, the immiscible phase consists of two coexisting binary PVC/PPMA and PVC/PAMA phases. For an equal amount of the two polymethacrylates in the ternary blend, the PVC/PPMA phase contains 65% of the total weight of PVC and the whole quantity of PPMA; the total amount of PAMA mixes with the remaining 35% PVC to form the PVC/PAMA phase. In contrast, the miscibility zone is predominant in the ternary PVC/PBMA/PAMA system, since blends containing 30% or more of PVC exhibit a single glass transition temperature. In the immiscibe zone, the PVC is distributed equally between PBMA and PAMA, which is in contrast to the 65%-35% distribution found in the previous system. These results are consistent with the differences of miscibility observed in the binary PVC/polymethacrylate blends discussed.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/actp.1993.010440608
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