Results 71 to 80 of about 1,780 (198)

Efeito de plastificantes à base de poliisobutenos nas propriedades físicas e mecânicas do polipropilen The efect of polyisobutenes in mechanical and physical properties of polypropylene

open access: yesPolímeros, 2013
Neste trabalho investigou-se o efeito de poliisobutenos (PIB´s), de massas molares variando de 480 a 1.600 g/mol, no polipropileno isotático. Composições contendo até 7% dos PIB´s foram preparadas em misturador interno e corpos de prova foram ...
Uédson Alexandre do Nascimento   +2 more
doaj  

Preparing oxidizer coated metal fuel particles [PDF]

open access: yes, 1974
A solid propellant composition of improved efficiency is described which includes an oxidizer containing ammonium perchlorate, and a powered metal fuel, preferably aluminum or beryllium, in the form of a composite.
Shafer, J. I., Simmons, G. M.
core   +1 more source

Microstructure and Tensile Properties of Melt-Spun Filaments of Polybutene-1 and Butene-1/Ethylene Copolymer. [PDF]

open access: yesPolymers (Basel), 2023
Li J   +11 more
europepmc   +1 more source

Crystal structures and polymorphism of polymers: Influence of defects and disorder [PDF]

open access: yes, 2018
The crystal structures and the polymorphism of polymers are described on the basis of the main principles that define the conformation of polymer chains in the crystalline state and the modes of packing of macromolecules.
Auriemma, Finizia   +3 more
core   +1 more source

Avaliação de acessos de coqueiro-gigante em relação ao nível de infestação e severidade do dano provocado pelo ácaro-da-necrose. [PDF]

open access: yes, 2016
Anais do 1º Simpósio da Rede de Recursos Genéticos Vegetais do Nordeste (I RGVNE), Cruz das Almas, nov ...
FERREIRA, J. M. S., RAMOS, S. R. R.
core  

Attapulgite Structure Reset to Accelerate the Crystal Transformation of Isotactic Polybutene. [PDF]

open access: yesPolymers (Basel), 2022
Mao SD   +9 more
europepmc   +1 more source

Time dependent fracture of polymers [PDF]

open access: yes, 1989
The fracture behavior of polymers is reviewed with emphasis on the time dependent aspects of the problem. Following a delineation of the history of crack propagation investigations in linearly viscoelastic materials, the effects of temperature and ...
Knauss, W. G.
core  

Seasonal phenology of the diamondback moth, Plutella xylostella (L.), (Lepidoptera: Plutellidae), and its parasitoids on canola, Brassica napus (L.), in Gauteng province, South Africa [PDF]

open access: yes, 2003
Canola, Brassica napus L. (Brassicaceae), is a relativelynewcrop in SouthAfrica. Several insect pests, including diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), that attack cruciferous vegetables, also attack canola.
Kfir, R   +2 more
core   +1 more source

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