Embrittlement of polybutylene terephthalate induced by injection molding

被引：2

作者：

Loyer, C. ^{[1
,2
]}

Ferreira, P. ^{[1
]}

Marijon, J-B ^{[1
]}

Michel, V ^{[1
]}

Regnier, G. ^{[1
]}

Vera, J. ^{[2
]}

Duval, V ^{[2
]}

Richaud, E. ^{[1
]}

机构：

[1] HESAM Univ, PIMM Lab, Arts & Metiers Inst Technol, CNRS,Cnam, 151 Blvd Hop, F-75013 Paris, France

[2] APTIV, F-28230 Epernon, France

来源：

POLYMER DEGRADATION AND STABILITY | 2022年 / 196卷

关键词：

Injection molding; Processing window; Embrittlement; Degradation; Kinetic modeling; PBT; SOLID-STATE POLYCONDENSATION; POLY(BUTYLENE TEREPHTHALATE); MECHANICAL-PROPERTIES; THERMAL-DEGRADATION; SEMICRYSTALLINE POLYMERS; KINETICS; TEMPERATURE; MORPHOLOGY; PYROLYSIS; FRACTURE;

D O I：

10.1016/j.polymdegradstab.2022.109843

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Embrittlement caused by injection molding was investigated on a commercial grade of Polybutylene terephthalate (PBT). The effect of temperature and residence time in the barrel on mechanical properties was studied. Results were discussed from macromolecular analysis by Gel Permeation Chromatography and crystallinity measurements by differential scanning calorimetry. It was shown that embrittlement exclusively occurs by a chain scission process in those conditions. Oxygen is shown to play a negligible role in degradation while thermolysis seems to be the main source of degradation. It was here described by a first simple kinetic model based on the beta abstraction of hydrogen at the vicinity of ester groups. A processing window was thus determined using this model and might help practitioners for processing PBT parts. (C) 2022 Elsevier Ltd. All rights reserved.

引用

页数：10

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