Bisphenol polycarbonate/polyethylene

Bisphenol A polycarbonate/polyethylene terephthalate/ABS, with an exception of DP4-1370, which does not contain ABS, but contains HDPE, PC/PET/impact modifier... 

We have not mentioned here the crucial inverse mapping of the realistic polymer structure onto the stream line. For polymers without side groups, such as polyethylene or bisphenol-A-polycarbonate, the following strategy has successfully been used [98] an energy minimization of the internal energy contributions was carried out simultaneously with a minimization of the distances of all atoms to the stream line (to this end, the sum of the squared dis-... 

Both vibrational spectroscopies are valuable tools in the characterization of crystalline polymers. The degree of crystallinity is calculated from the ratio of isolated vibrational modes, specific to the crystalline regions, and a mode whose intensity is not influenced by degree of crystallinity and serves as internal standard. A significant number of studies have used both types of spectroscopy for quantitative crystallinity determination in the polyethylenes [38,74-82] and other semi-crystalline polymers such as polyfethylene terephthalate) [83-85], isotactic poly(propylene) [86,87], polyfaryl ether ether ketone) [88], polyftetra-fluoroethylene) [89,90] and bisphenol A polycarbonate [91]. 

The polymers considered in Sects. 4 to 6, i.e. polyethylene fere-phthalalc), bisphenol A polycarbonate and aryl-aliphatic polyamides, are linear polymers or copolymers without side chains, in which molecular motions occur in the glassy state. Detailed analysis of the transitions, mostly the ft transition, reveals that several processes are involved in this ft transition and that the co-... 

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... 

To the range of engineering plastics were added polyethylene and polybutylene tereph-thalates (PET and PBT), as well as General Electric s polyethers, the PPO (polyphenylene oxide) produced through polymerization of 2,6-xylenol and the Noryl plastic produced by blending PPO with polystyrene. Other special polymers, derived like the polycarbonates from bisphenol A, were added to this range polyarylates, polysul-fones, polyetherimides. 

Kanemitsu and Einami (1990) investigated the role of the polymer on hole transport in a series of 2-(p-dipropylaminophenyl)-4-(p-dimethylaminophenyl)-5-(o-chlorophenyl)-l,3-oxazole (OX) doped polymers. The polymers were a polyarylate (PA), bisphenol-A polycarbonate (PC), poly(methyl methacrylate) (PMMA), poly(styrene) PS, poly(vinyl chloride) (PVC), polyethylene terephthalate) (PET), and poly(vinyl butyral) (PVB). The glass transition temperatures of the polymers range from 322 (PVB) to 448 K (PA). The temporal features of the photocurrent transients were strongly dependent on the polymer. Figure 76 shows the results. The field was 4.0 x H)5 V/cm and the temperature 295 K. The transients were near rectangular for PS, PET, PA, and PMMA, and highly dispersive for PVC land PVB. This was attributed to the fact... 

The stress-strain curves of ductile thermoplastics (including both glassy amorphous polymers such as bisphenol-A polycarbonate and semicrystalline polymers such as polyethylene at room temperature) have the general shapes shown in Figure 11.16(a), which can be compared with the shape of the stress-strain curve of a very brittle material shown in Figure 11.16(b). The stress-strain curves of polymers which are neither very ductile nor very brittle under the testing conditions being utilized have appearances which are intermediate between these. two extremes. 

It has been asserted (14) that above their melting points, the structural relaxation times in polymer fluids would be much less than 10" sec. This proved to be true for molten PE. However, for polyethylene oxide (PEO) a temperature of maximum loss was observed at approximately 60°C at a frequency of 6.06 GHz (J5). The melting point of PEO is near 60°C. The temperature of maximum loss for bisphenol-A polycarbonate (16) was 280°C at a frequency of 5.43 GHz. The melting point of bisphenol-A polycarbonate is 240°C. Thus any general correlation between Tm and structural relaxation in fluids seems unwarranted. 

The high impact strength, dimensional stability and optical clarity (low crystallinity) of bisphenol-A polycarbonate (PC) together with its low dielectric loss have led to a range of applications embracing optical components, CD-ROMs, film capacitors and safety-related products Subsequent market demands for enhanced physical properties has stimulated the development of a range of commercial blends of which rubber-modified bisphenol-A polycarbonate (PC) with polybutylene terephthalate (PBT) or polyethylene terephthalate (PET) are amongst the more successful ... 

Fig. 2.3 Polyethylene terephthalate (PET) polyamide-6 (Nylon-6) polycarbonate of bisphenol-A (PC).

BaiUy, Ch. Daoust, D. Legras, R. Mercier, J.P. Chemical nucleation, a new concept applied to the mechanism of action of organic add salts on the crystallization of polyethylene terephthalate and bisphenol-A polycarbonate. Polymer 1986, 27 (5), 776-782. 

---