Real‐time Raman spectroscopy measurements to study the uniaxial tension of isotactic polypropylene: a global overview of microstructural deformation mechanisms

J Martin, M Ponçot, JM Hiver… - Journal of Raman …, 2013 - Wiley Online Library
Micro‐Raman spectroscopy was used to investigate the main deformation
micromechanisms of isotactic polypropylene uniaxially stretched at constant temperature (T …

Deformation mechanism of high-density polyethylene probed by in situ Raman spectroscopy

T Kida, T Oku, Y Hiejima, K Nitta - Polymer, 2015 - Elsevier
The microscopic mechanism of high-density polyethylene under uniaxial drawing is
investigated using in situ Raman spectroscopy. From the peak shifts of the symmetric and …

The role of mandrel rotation speed on morphology and mechanical properties of polyethylene pipes produced by rotational shear

H Yang, X Luo, K Shen, Y Yuan, Q Fu, X Gao, L Jiang - Polymer, 2019 - Elsevier
Abstract Properties of plastic products depend on their microstructure and morphology. To
improve the pressure rating (maximum pressure) of plastic pipes, a novel rotational shear …

Annealing‐induced structural rearrangement and its toughening effect in injection‐molded isotactic polypropylene

B Na, Z Li, R Lv, S Zou - Polymer Engineering & Science, 2012 - Wiley Online Library
To improve the toughness of isotactic polypropylene (iPP), by blending modification or
special processing techniques, is an ongoing pursuit in the polymer community. In this study …

Effects of different types of functionalized polypropylenes on the tensile strength of short carbon fiber-reinforced polypropylene composites

A Yamaguchi, H Uematsu, T Sakaguchi… - Polymer Journal, 2024 - nature.com
In this study, the effects of various functionalized polypropylenes (PPs) with different types
and contents of functional groups and crystallinities on the tensile strength of short carbon …

Anisotropic nanoparticles as templates for the crystalline structure of an injection-molded isotactic polypropylene/TiO2 nanocomposite

P Zhang, T Kraus - Polymer, 2017 - Elsevier
We study the molecular origins of anisotropy in a semicrystalline polymer nanocomposite
that is caused by aligned, elongated filler nanoparticles. Our study is based on spatially …

Development of residual stress evaluation method for polymer products using THz polarization measurement

Y Kajihara, A Tanaka, W Chen, S Wang, K Tao… - CIRP Annals, 2024 - Elsevier
This paper proposes to utilize THz polarization measurement to nondestructively measure
internal residual stress in polymer products. To verify the validity of the proposed method, a …

Structure and mechanical anisotropy of injection-molded polypropylene with a plywood structure

P Phulkerd, S Hirayama, S Nobukawa, T Inoue… - Polymer …, 2014 - nature.com
Injection-molded isotactic polypropylene (PP) containing a small amount of the β-nucleating
agent N, N′-dicyclohexyl-2, 6-naphthalenedicarboxamide exhibits a unique molecular …

Enhanced effect of thermal expansion process in rotational shear technology for high performance HDPE pipes

J Li, B Chen, H Yang, K Shen, C Deng, X Gao - Polymer, 2022 - Elsevier
The purpose of this paper is to study the effect of thermal expansion process and rotational
shear on the structure and properties of high-density polyethylene (HDPE) pipes. In this …

Structure and fracture toughness of thin-wall polypropylene moulded at different injection speeds

K Maeda, K Yamada, K Yamada, M Kotaki… - Thin-Walled …, 2018 - Elsevier
Thin-wall injection-moulded parts have received a great deal of attention because of their
lighter weight, which offers beneficial environmental and economic savings. However …