Journal ArticleDOI
Importance of the amorphous fraction of polypropylene in the resistance to radiation-induced oxidative degradation
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TLDR
In this paper, the role of the amorphous fraction (fa) of polypropylene resin in its resistance to radiation-induced oxidative degradation is discussed, and the relationship between the relationship is expressed by an empirical equation, 33·5.About:
This article is published in Polymer Degradation and Stability.The article was published on 1985-01-01. It has received 56 citations till now. The article focuses on the topics: Irradiation & Amorphous solid.read more
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Weathering of polymers: mechanisms of degradation and stabilization, testing strategies and modelling
J. R. White,Alison E. Turnbull +1 more
TL;DR: In this article, the authors reviewed the mechanisms of degradation and stabilization of polymers, the methods of testing weatherability, and the predictive modelling of weathering behavior, focusing on engineering aspects.
Journal ArticleDOI
Review: degradation-induced embrittlement in semi-crystalline polymers having their amorphous phase in rubbery state
TL;DR: In this article, the degradation-induced embrittlement mechanism in semi-crystalline polymers having their amorphous phase in rubbery state is reviewed and a simple relationship expressing the chemicrystallization yield for a given polymer structure is proposed.
Journal ArticleDOI
Degradation of poly(l-lactic acid) by γ-irradiation
TL;DR: In this article, a poly( l -lactic acid) (PLA) was irradiated with γ-rays in air and in vacuum at 25°C, and the degree of chain-scission G s of irradiated PLA was calculated to be 1.97 in air, and 0.83 in vacuum.
Journal ArticleDOI
Ultra-violet degradation of polypropylene: 1. Degradation profile and thickness of the embrittled surface layer
G.E. Schoolenberg,P. Vink +1 more
TL;DR: In this paper, the formation and consequences of the embrittled surface layer in artificially ultra-violet (u.v.) degraded polypropylene (PP) samples were investigated by visual inspection, infra-red spectrometry and mechanical testing.
Journal ArticleDOI
The ductile-brittle transition of irradiated isotactic polypropylene studied using simultaneous small angle X-ray scattering and tensile deformation
TL;DR: In this article, the micromechanical deformation mechanisms of irradiated and non-irradiated isotactic polypropylene (iPP) were studied as a function of temperature above the glass transition.
References
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Book
ESR Spectroscopy in Polymer Research
B. Rånby,Jan F. Rabek +1 more
TL;DR: The main purpose of as mentioned in this paper is to collect the present available information on the applications of electron spin resonance (ESR) spectroscopy in polymer research, both for those interested in an introduction to this field, and for those who are aheady familiar with ESR and are interested in application to polymers.
Journal ArticleDOI
Polymer reactions—Part VII: Thermal pyrolysis of polypropylene
TL;DR: In this paper, the first order rate constants for pyrolysis are 3·7 × 10−4 sec−1 and 4·0 × 10 −4sec−1 for atactic and isotactic polypropylene at 388°C; the corresponding overall activation energies are 56 ± 6 and 51 ± 5 kcal mole−1.
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The spherulitic and lamellar morphology of melt-crystallized isotactic polypropylene
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D. Kostoski,Z. Stojanović +1 more