Effect of Nanodisperse Carbon Fillers and Isocyanate Chain Extender on Structure and Properties of Poly(ethylene terephthalate)

Table 2

Property values for polyester materials.

Composition	[η] (dL/g)	M𝑛	MFI (g/10 min)	𝜎buf (MPa)	𝜎ctt (MPa)	𝜎𝑟 (MPa)	𝜀𝑟 (%)	S (%)
								SII	S⟂
I^a	0.634	16006	23.0	54	199	42	374	0.85	0.54
II	0.746	22626	16.7	54	256	50	412	0.75	0.53
III	0.728	21480	18.8	55	282	55	412	1.23	0.58
IV	0.727	21417	19.5	56	325	60	441	1.21	0.66
V	0.723	21411	18.9	53	270	53	410	0.95	0.56
VI	0.737	22049	18.0	56	300	58	418	0.96	0.54

Here and in subsequent tables and figures, materials markings are as in Table 1. ^aComposition I was subjected to single extrusion at regimes similar to compounding of Compositions II–VI. ^b𝜎_uf is upper flow limit. ^c𝜎_tt=𝜎_𝑟(1+𝜀_𝑟/100) is true tensile strength, where 𝜎_𝑟 and 𝜀_𝑟 are, respectively, strength and relative elongation at break.