Blended with bisphenol A polycarbonate

ABS can be blended with bisphenol A polycarbonate resins to make a material having excellent low temperature toughness. The most important apphcation of this blend is for automotive body panels. 

Journal of Polymer Science Polymer Physics Edition 32, No.3, Feb. 1994, p.395 08 TOUGHENING OF A HIGHLY CROSS-LINKED EPOXY RESIN BY REACTIVE BLENDING WITH BISPHENOL A POLYCARBONATE. I. 

A highly crosslinked epoxy resin was modified by reactive blending with bisphenol A polycarbonate. The bisphenol A polycarbonate was dissolved at high temperature in the uncured epoxy resin before the curing process. The physical and chemical interactions between the two components were studied by FTIR spectroscopy and the reaction mechanisms were discussed. FTIR isothermal measurements showed that the presence of polycarbonate did not affect the overall curing mechanism but decreased both the initial reaction rate and the final conversion of reactants. 13 refs. 

Abbate M, Martuschelli E, Musto P, Ragosta G, Scarinzi G (1984) Toughening of a highly cross-linked epoxy resin by reactive blending with bisphenol A polycarbonate. I. FTIR spectroscopy. J Polym Sci Polym Phys Ed 32 395-408... 

McNeill and Basan [151] studied the thermal degradation of blends of PVC with bisphenol-A polycarbonate. The structure of bisphenol-A polycarbonate is given in Eq. (42). 

The most-common polycarbonates are based on bisphenol A (see Figure 4.75) but, more recently, heat resistant grades were launched based on other bisphenols, possibly blended with bisphenol A. 

The observation that Bib is more exothermic than Bz3 is not surprising when one considers the fact that blends of tetramethyl bisphenol-A polycarbonate with polystyrene are miscible while blends of bisphenol-A polycarbonate with polystyrene are immiscible (43 ). Apparently, substitution of methyl groups on the aromatic rings in the backbones of these materials enhances miscibility with the styrene repeat unit. The observation that Biz is also exothermic is quite surprising, considering the similarity of the trimethyl and dimethyl ether units. Using regular solution approximations, one could... 

The blend of bisphenol-A polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS) resin is a useful industrial material. One reason is that the miscibility between PC and poly(styrene-co-acrylonitrile) (SAN), which is a matrix of ABS resin, is not too bad, though it is immiscible. In particular, a blend of PC and SAN-25 with 25 wt% AN is useful, because the miscibility is the best in PC/SAN systems and the blend shows the lowest value of x in the system (Li et al. 1999). The blend has been used without any compatibUizers. It would be expected that the... 

Pilati, F., Fiorini, M., and Berti, C., Effects of Catalysts in the Reactive Blending of Bisphenol A Polycarbonate with Poly(aIkylene Terephthalate)s, in Transreactions in Condensation Polymers, S. Fakirov, ed., WUey-VCH, Weinheim, 1999. 

For blends of PCL with bisphenol-A polycarbonate, Shah et al. determined a value of the interaction parameter B of -1.6 J cm [43]. Values of interaction parameters B with tetramethylbisphenol-A polycarbonate of -7.5 J cm [86] and -8.2 J cm [87] have been reported. 

Cruz et al. [21] established the general features of blends of bisphenol-A polycarbonate (PC) (Lexan 310, M =29,200) with PCL (PCL-700, Table 1). Samples were prepared by melt mixing at 260 °C for no longer than 8 min polyesters and polycarbonates are susceptible to interchange reactions on prolonged heating at... 

The first positron annihilation lifetime (PAL) measurements on polymer blends were conducted by Jean et al. [9], who investigated the free volume properties of (i) a miscible blend, namely tetramethyl-bisphenol A polycarbonate (TMPC) and polystyrene (PS) and (ii) an immiscible blend, namely bisphenol A polycarbonate (PC) and PS. It was observed that TMPC formed a miscible blend with PS as it had larger fractional free volume cavities than PC. For the miscible blend, the free volume showed negative deviation from the linear additivity rule (Eq. (27.19)), whereas for immiscible blend it was observed that the free volume, as detected by o-Ps lifetime as a function of composition, was complicated due to the presence of... 

K.H. Pawlowski, B. Schartel, M.A. Fichera, and C. Jager, Flame retar-dancy mechanisms of bisphenol A bis(diphenyl phosphate) in combination with zinc borate in bisphenol a polycarbonate/acrylonitri-le-butadiene-styrene blends, Thermochim. Acta, In Press, Accepted Manuscript, 2009. 

Blending of polymers is an attractive method of producing new materials with better properties. Blends of aliphatic polyesters, especially of poly(e-CL), have been investigated extensively and have been the subject of a recent review paper [170]. Poly(e-CL) has been reported to be miscible with several polymers such as PVC, chlorinated polyethylene, SAN, bisphenol A polycarbonate, random copolymers of Vdc and VC, Vdc and AN, and Vdc/VAc, etc. A single composition-dependent Tg was obtained in the blends of each of these polymers with poly(e-CL). This is of interest as a polymeric plasticizer in these polymers. Blends of PVC and poly(e-CL) with less than 50 wt % of poly(e-CL) were homogeneous and exhibited a single Tg. These blends were soft and pliable because the inherent crystallinity of poly(e-CL) was destroyed and PVC was plasticized... 

K.H. Pawlowski and B. Schartel, Flame retardancy mechanisms of aryl phosphates incombination with boehmite in bisphenol A polycarbonate/acrylonitrile butadiene styrene blends, Polym. Degrad. Stabil., 2008, 93 657-667. 

Chen and Gardella used this surface engineering strategy to create siloxane-rich surfaces [40]. Their approach involved the blending of a homopolymer (A) with a block copolymer composed of a block with the same chemical identity as the homopolymer (A) and a block of PDMS. For all homopolymer types studied (polystyrene, poly(cc methyl.styrene) and Bisphenol A polycarbonate), XPS analysis of Si C ratios revealed a significant enrichment of the PDMS... 

In addition to copolymers, various blends containing polyalkylstyrenes are used in practice. One such polymer is poly(4-methoxystyrene) 1/1 w/w blend bisphenol A polycarbonate. The thermal decomposition of this polymer when heated from ambient to 500° C generates CO2, 4-methoxystyrene, a-methyl-4-methoxystyrene, p-cresol and small amounts of other phenols, poly (4-methoxystyrene), dimer and trimer with vinylidene and saturated ends, polycarbonate cyclic dimer and chain fragments, bisphenol A, etc. [94]. 

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