[...]... Terms of Use as given at the website Tm, °C HDT, °C 264 lb/in2 66 lb/in2 50–85 11 5 19 0 1. 30 1. 38 50–300 Ultimate elongation, % Specific gravity 56–60 Ultimate tensile strength, MPa 19 30–3000 220–267 PBT unfilled 19 6–225 216 –260 1. 48 1. 54 2–4 96 13 4 8,960 10 ,000 220–267 30% glass filled PBT 260 >260 1. 45 1. 9–2.3 12 4 13 4 – – 30% glass filled PCT 2 21 268 1. 41 3 .1 97 – 285 30% glass filled PCTA 21 65 75 1. 29 1. 40... 6–50 38–74 35–60 6.6 13 2.7 1. 9 14 .3 9.9 14 9.3 6.6–23.8 13 .3 18 2.5 1. 9 19 .0 Rockwell hardness, R scale 39 12 0 29 11 7 20 12 0 % moisture absorption at 24 hr 2.0–6.5 1. 0–4.0 1. 0–3.0 Tensile strength at fracture, 23°C, MPa Ultimate elongation, % Izod impact strength, J/m notched, 23°C notched, –40°C Formulation of cellulose esters is required to reduce charring and thermal discoloration, and it typically includes... Terms of Use as given at the website Thermoplastics Thermoplastics TABLE 1. 7 31 PC Thermal and Mechanical Properties 30 Percent glass-filled Makroblend Xenoy, Polycarbonate polycarbonate PR 51, Bayer CL1 01 GE Heat-deflection temperature, °C Method A 13 8 280 90 95 Heat-deflection temperature, °C Method B 12 287 10 5 10 5 Ultimate tensile strength, N/mm2 >65 70 56 >10 0 Ultimate elongation, % 11 0 3.5 12 0 >10 0... range of formulations are given in Table 1. 6.53 Properties can be tailored by formulating with different types and loadings of plasticizers TABLE 1. 6 Selected Mechanical Properties of Cellulose Esters Cellulose acetate Cellulose acetate butyrate Cellulose acetate propionate Acetyl 38–40 13 15 1. 5–3.5 Butyrl – 36–38 – Composition, % Propionyl – – 43–47 Hydroxyl 3.5–4.5 1 2 2–3 13 .1 58.6 13 .8– 51. 7 13 .8– 51. 7... 3 .1 97 – 285 30% glass filled PCTA 21 65 75 1. 29 1. 40 30–300 48–72 2760– 414 0 212 –265 PET unfilled 1. 27 1. 55 1. 70 64 70 11 0 2–7 210 –227 243–249 28 – – PETG unfilled 13 8 16 5 8,960–9,930 245–265 30% glass filled PET Comparison of Thermal and Mechanical Properties of PBT, PCT, PCTA, PET, PETG, and PCTG Tensile modulus, MPa TABLE 1. 8 65 74 1. 23 330 52 – – PCTG unfilled Thermoplastics Downloaded from Digital Engineering... Other Export 29 13 58 36 13 6 13 28 31 14 65 40 15 4 14 28 Total 313 346 1. 5 .12 .3 Polycyclohexylenedimethylene terephthalate (PCT) Another polyalkylene terephthalate polyester of significant commercial importance is PCT—a condensation product of the reaction between dimethyl terephthalate and 1, 4-cyclohexylene glycol as shown below in Fig 1. 28 This material is biaxially oriented into films and, while it... celluloses of differing mechanical properties, and Table 1. 5 compares the tensile strengths and ultimate elongations of some common celluloses.52 TABLE 1. 5 Selected Mechanical Properties of Common Celluloses Tensile strength, MPa Form Ultimate elongation, % Dry Wet Dry Wet Ramie 900 10 60 2.3 2.4 Cotton 200–800 200–800 12 16 6 13 824 863 1. 8 2.2 Viscose Rayon 200–400 10 0–200 8–26 13 –43 Cellulose Acetate 15 0–200... self-lubricating tendencies .12 3 Nylon 6 is prepared from caprolactam It has properties similar to those of nylon 6/6 but has a lower melting point (255°C) One of the major applications is in tire cord Nylon 6/ 10 has a melting point of 215 °C and lower moisture absorption than nylon 6/6 .12 4 Nylon 11 and nylon 12 have lower moisture absorption and also lower melting points than nylon 6/6 Nylon 11 has found applications... Fig 1. 19 There are five main methods to polymerize nylon 1 Reaction of a diamine with a dicarboxylic acid 2 Condensation of the appropriate amino acid 3 Ring opening of a lactam 4 Reaction of a diamine with a dicarboxylic acid 5 Reaction of a diisocyanate with a dicarboxylic acid100 The type of nylon (nylon 6, nylon 10 , etc.) is indicative of the number of carbon atoms The are many different types of. .. nylon, relieving some of the molding stresses and causing dimensional changes In extrusion, a screw with a short compression zone is used, with cooling initiated as soon as the extrudate exits the die .11 9 A variety of commercial nylons are available, including nylon 6, nylon 11 , nylon 12 , nylon 6/6, nylon 6 /10 , and nylon 6 /12 The most widely used nylons are nylon 6/6 and nylon 6 .12 0 Specialty grades . 3.7 Polyarylate 15 5 68 2 .1 288 1. 19 15 .2 3 .1 LCP 311 11 0 11 10 1 1. 70 20 .1 4.6 Nylon 6 65 81. 4 2.76 59 1. 13 16 .5 3.8 Nylon 6/6 90 82.7 2.83 53 1. 14 23.6 4.0 PBT 54 52 2.3 53 1. 31 15.7 3.3 PC 12 9 69 2.3 694 1. 20. 99 41 2.3 347 1. 18 15 .7 3.0 CA 68 37.6 1. 26 210 1. 30 16 .7 5.5 CAB 69 34 .88 346 1. 19 12 .8 4.8 PTFE 17 .1 .36 17 3 2.2 17 .7 2 .1 PCTFE 50.9 1. 3 18 7 2 .12 22.2 2.6 PVDF 90 49.2 2.5 202 1. 77 10 .2 10 .0 PB. 59.4 1. 24 346 1. 18 18 .1 6.5 PS 93 45 .1 3 .1 59 1. 05 19 .7 2.5 PVC–rigid 68 44.4 2.75 18 1 1. 4 34.0 3.4 PVC–flexible 9.6 293 1. 4 25.6 5.5 POM 13 6 69 3.2 13 3 1. 42 19 .7 3.7 PMMA 92 72.4 3 21 1 .19 19 .7