Effect of multiple extrusions and influence of PP contamination on the thermal characteristics of bottle grade recycled PET

被引：31

作者：

Itim, Bachir ^{[1
]}

Philip, Mathew ^{[1
]}

机构：

[1] London Metropolitan Univ, Sir John Cass Fac Architecture & Design, London E1 1LA, England

来源：

POLYMER DEGRADATION AND STABILITY | 2015年 / 117卷

关键词：

Bottle grade recycled PET; PP contamination; Chain scission; Cross-linking; Crystallinity; CRYSTALLIZATION KINETICS; POLY(ETHYLENE-TEREPHTHALATE); DEGRADATION;

D O I：

10.1016/j.polymdegradstab.2015.04.004

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The thermal characteristics of bottle grade recycled PET pellets contaminated with 5% PP prepared by multiple extrusions were studied by differential scanning calorimetry (DSC) at constant heating rate of 10 degrees C/min for various extrusion cycles. The peak temperature of crystallization T-c, the enthalpy of crystallization Delta H-c and the degree of crystallinity X-c were found to be dependent on the number of extrusion cycles. From the dependence on extrusion cycles, the analysis of the crystallization mechanism by Avrami model has been determined, the Avrami exponent n and the rate constant Z(t) were calculated and the influence of the 5% PP on the bottle grade recycled PET matrix during multiple extrusions and its effect on crystallinity was thoroughly discussed. (c) 2015 Elsevier Ltd. All rights reserved.

引用

页码：84 / 89

页数：6

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