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Compatibilization of thermosetting‐thermoplastic polymer blends
Author(s) -
Jayabalan M.,
Balakrishnan T.
Publication year - 1985
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760250908
Subject(s) - materials science , thermosetting polymer , copolymer , differential scanning calorimetry , thermoplastic , polymer , polymer chemistry , compatibilization , thermoplastic elastomer , polymer blend , methyl methacrylate , composite material , physics , thermodynamics
Polymer blends of thermosetting and thermoplastic polymers were developed by properly mixing them in the presence of compatibilizers. Two compatibilizers that are structurally and chemically similar to thermosetting and thermoplastic polymers and a compatibilizer that does not have such similarity were synthesized. Polymer blends of phenol formaldehydepoly(methyl methacrylate) and phenol formaldehyde‐polystyrene were prepared by using the compatibilizers, poly(phenol formal dehyde‐s‐triazine‐methyl methacrylate), P(PF‐g‐MMA), poly(phenol formaldehyde‐s‐triazine‐styrene), P(PF‐g‐S), and poly (cinnamaldehyde‐co‐oxy propylene oxy isophthaloyl‐cooxy propylene oxy fumaroyl), P(C‐g‐E). The effects of molecular weight and quantity of the copolymer on the compatibility of the polymer were examined. The optimum compatibility which leads to superior tensile properties of the present blends was observed with P(PF‐g‐MMA) and P(PF‐g‐S) copolymers. The superior properties were also found to occur only in the range of the optimum molecular weight and quantity of the copolymer present in the blend. The polymer blends were analyzed by differential scanning calorimetry (DSC) and Electron Microscopy. DSC scans of P(PF‐g‐MMA) and P(PF‐g‐S) copolymer blends showed a single T g whereas the scans of P(Cg‐E) copolymer blends showed an additional T g for unblended thermoplastic fractions. The electron microscopy studies also revealed good compatibility in P(PF‐g‐MMA) and P(PF‐g‐S) copolymer blends in which the unblended thermoplastic fractions are negligibly less. The UV‐vacuum and heat resistance of the P(PF‐g‐MMA) and P(PF‐g‐S) copolymer blends were found to be good.