Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Fracture toughness of α- and β-phase polypropylene homopolymers and random- and block-copolymers
Polymer, Volume 43, No. 24, Year 2002
Notification
URL copied to clipboard!
Description
The fracture and failure mode of α- and β-phase polypropylene homopolymers (PP-H), block- (PP-B) and random-type (PP-R) copolymers with ethylene were studied in high speed (1.2 m/s) flexural tests and compared. The crystallinity of the α- and β-modifications was assessed by wide-angle X-ray scattering and differential scanning calorimetry. The linear elastic fracture mechanical parameters, viz. fracture toughness (Kc) and fracture energy (Gc), were determined at room temperature and T = -40°C on notched Charpy specimens. β-Phase PP-H and PP-B showed superior toughness to the α-versions. On the other hand, Kc and Gc were similar for PP-R in the temperature range studied for both α- and β-modifications. Fracture surfaces of the broken specimens were inspected in scanning electron microscopy and the related failure mode concluded. A model was proposed to explain the toughness improvement via β-crystallinity by considering all proved experimental findings. © 2002 Published by Elsevier Science Ltd.
Authors & Co-Authors
Karger-Kocsis, Jõzsef K.
Germany, Kaiserslautern
Technische Universität Kaiserslautern
Statistics
Citations: 283
Authors: 1
Affiliations: 3
Identifiers
Doi:
10.1016/S0032-3861(02)00590-6
ISSN:
00323861