Adiabatic Stretching as a Method of Investigation of the Elastic Properties of Rubberlike Materials

1956 ◽  
Vol 29 (4) ◽  
pp. 1209-1214
Author(s):  
M. P. Votinov ◽  
E. V. Kuvshinskiĭ
Keyword(s):  
Elastic Properties ◽  
Direct Method ◽  
Rubber Compounds ◽  
A Direct Method ◽  
Rubberlike Materials ◽  
Elastic Characteristics

Abstract 1. A direct method has been proposed for the study of the elastic characteristics of rubber stocks under nonequilibrium deformation conditions. 2. This method has been successfully applied in the study of the elastic characteristics of “crystallizing” and “noncrystallizing” unloaded rubber compounds.

scholarly journals Plastic waste to fuels by hydrocracking at mild conditions

2021 ◽  
Vol 7 (17) ◽  
pp. eabf8283
Author(s):  
Sibao Liu ◽  
Pavel A. Kots ◽  
Brandon C. Vance ◽  
Andrew Danielson ◽  
Dionisios G. Vlachos
Keyword(s):  
Direct Method ◽  
Acid Sites ◽  
Liquid Fuels ◽  
High Yield ◽  
Tandem Catalysis ◽  
Hy Zeolite ◽  
Environmental Threat ◽  
Single Use ◽  
Initial Activation ◽  
A Direct Method

Single-use plastics impose an enormous environmental threat, but their recycling, especially of polyolefins, has been proven challenging. We report a direct method to selectively convert polyolefins to branched, liquid fuels including diesel, jet, and gasoline-range hydrocarbons, with high yield up to 85% over Pt/WO3/ZrO2 and HY zeolite in hydrogen at temperatures as low as 225°C. The process proceeds via tandem catalysis with initial activation of the polymer primarily over Pt, with subsequent cracking over the acid sites of WO3/ZrO2 and HY zeolite, isomerization over WO3/ZrO2 sites, and hydrogenation of olefin intermediates over Pt. The process can be tuned to convert different common plastic wastes, including low- and high-density polyethylene, polypropylene, polystyrene, everyday polyethylene bottles and bags, and composite plastics to desirable fuels and light lubricants.

A Direct Method of Computing the GNAF of an Integer

1975 ◽  
Vol C-24 (10) ◽  
pp. 1042-1043 ◽  
Author(s):  
J.J. Liu ◽  
L.D. Rudolph
Keyword(s):  
Direct Method ◽  
A Direct Method
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