| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: polyethylene terephthalate (PETP) resin is resulted from polymerisation of melted intermediate polymerisation product at low pressure or in inert gas medium. The disclosed PETP resin is characterised with intrinsic viscosity [] 0.4 to 2.5 dl/g, carboxyl terminal group content 30 mekv/kg or lower, acetaldehyde content 10 mass fractions or less, colour displayed by value L=99 or more and value b=0.4 or less, chain-length distribution Mw/Mn 1.8 to 2.3 and cyclic trimer content 5 wt % or less. There is also disclosed polymerisation procedure, a polymerisation reactor, moulding process and moulded material. ^ EFFECT: polymerisation procedure allows making polyester resin by simplified technology with low crystallinity, small portion of cyclic trimer and improved processing quality. ^ 26 cl, 8 dwg, 12 tbl, 32 ex |
