Flexible cellular polymeric materials. Determination of tensile strength and elongation at break

2000 ◽  
Keyword(s):  
Tensile Strength ◽  
Polymeric Materials ◽  
Elongation At Break

Studies on the Mechanical Properties of Foam CB-PVC Composite

2013 ◽  
Vol 681 ◽  
pp. 256-259
Author(s):  
Xiu Qi Liu ◽  
He Qin Xing ◽  
Li Li Zhao ◽  
Dan Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Mechanical Index ◽  
Melt Blending ◽  
Elongation At Break ◽  
Foam Composite ◽  
The Matrix ◽  
System Prototype ◽  
Made In

In our study, a new kind of foam composite was prepared by melt blending with PVC as the matrix and carbon black (CB) as the filler, the standard-spline was made in the dumbbell system prototype. Tensile strength and elongation at break were measured at 25°C。When the CB was added greater than 2.0%, with the increase of CB added, the determination of sample mechanical index began to decline, when the CB content was greater than 9%, tensile strength and elongation at break of the composites remained basically unchanged.

Development of New Polymers from Thevetia peruviana Oil

2020 ◽  
Vol 48 ◽  
pp. 9-23 ◽  
Author(s):  
Adebayo F. Owa ◽  
Isiaka O. Oladele ◽  
Adeolu Adesoji Adediran ◽  
Joseph A. Omotoyinbo
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Cationic Polymerization ◽  
Boron Trifluoride ◽  
Seed Oil ◽  
Polymeric Materials ◽  
Boron Trifluoride Etherate ◽  
Elongation At Break ◽  
Synthesized Materials ◽  
The Impact

Three novel bio-polymers were synthesized by cationic polymerization of Thevetia peruviana seed oil with styrene and divinylbenzene using modified boron trifluoride etherate as initiator. The cured thermosets ranging from soft to hard, were found to contain between 74.8 to 85.5 % cross linked materials with crosslink densities ranging from 1.33 x 103 to 1.84 x 103 mol/m3. The ultimate tensile strength of the materials varied from 0.52 to 0.55 Mpa, the young moduli is between 38.4 to 53.9 Mpa, the elongation at break varied from 55 to 64 %, the density of the polymers ranged between 0.850 to 0.866 gcm-3, the impact strength is between 2.31 to 2.81 J, while hardness ranged between 3.40 to 3.90 BHN. Overall, the newly synthesized materials from Thevetia peruviana oil have many potentials as new polymeric materials.

scholarly journals SYNTHESIS OF POLYIMIDES OF ARILACYCLIC STRUCTURE

2021 ◽  
Vol 74 (2) ◽  
pp. 124-132
Author(s):  
A.V. Druzhinina ◽  
◽  
M.Sh. Suleimenova ◽  
O.A. Almabekov ◽  
A.K. Kusainova ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Polymeric Materials ◽  
Solar Irradiation ◽  
Optimal Conditions ◽  
Basic Catalyst ◽  
High Tensile Strength ◽  
Polyimide Films ◽  
Medium Frequency ◽  
Elongation At Break ◽  
Catalyst Type

The article describes methods for producing polymeric materials based on tetra-carboxylic acid dianhydrides obtained by photochemical or solar irradiation from furan and maleic anhydride. The procedure of synthesis of aryl-alicyclic polyimides based on 7-оxsоdiciklo (2,2,1)-gepten -2,3- dicarboxylic acid(MAF) and diaminodiphenyl oxide diamines (DADFO) and dioxytriphenyldiamine (DOTFDA) in polar aprotic amide-type solvents has been studied in detail in the presence of a basic catalyst type: trimethyl-amine.The nature and reactivity of staring monomers affect the process of obtaining polyimides. The optimal conditions for obtaining polyimides with intrinsic viscosity values of 1.30-1.64 dl/g have been found. Physicochemical, electrical and thermal proper-ties of the synthesized polyimides have been investigated. It was found that they have increased elasticity, high tensile strength. Elongation at break of polyimide films reaches 30-43%, tensile strength is 130-180 MPa. According to their electrical properties, these polyimides are classified as medium-frequency dielectrics. In addition, they differ in thermoplasticity in the range from 210 ºС to 250 ºС, have thermal stability and do not decompose at heating in air to temperatures of 335-390 ºС, and the presence of oxide groups in the structure of polymers increases the solubility of polyimides.

Determination of Combined and Second Order Factor Effects for Simultaneous Optimization of Physical and Mechanical Properties of NR/BR Blend System

2014 ◽  
Vol 42 (4) ◽  
pp. 290-304
Author(s):  
Rajarajan Aiyengar ◽  
Jyoti Divecha
Keyword(s):  
Physical And Mechanical Properties ◽  
Second Order ◽  
Simultaneous Optimization ◽  
Order Effects ◽  
Elongation At Break ◽  
Five Factors ◽  
Rubber Compounds ◽  
Polybutadiene Rubber ◽  
Contour Plots

ABSTRACT The blends of natural rubber (NR), polybutadiene rubber (BR), and other forms of rubbers are widely used for enhancing the mechanical and physical properties of rubber compounds. Lots of work has been done in conditioning and mixing of NR/BR blends to improve the properties of its rubber compounds and end products such as tire tread. This article employs response surface methodology designed experiments in five factors; high abrasion furnace carbon black (N 330), aromatic oil, NR/BR ratio, sulfur, and N-oxydiethylene-2-benzothiazole sulfenamide for determination of combined and second order effects of the significant factors leading to simultaneous optimization of the NR/BR blend system. One of the overall optimum of eight properties existed at carbon 44 phr, oil 6.1 phr, NR/BR 78/22 phr with the following values of properties: tensile strength (22 MPa), elongation at break (528%), tear resistance (30 kg/mm), rebound resilience (67%), moderate hardness (68 International rubber hardness degrees) with low heat buildup (17 °C), permanent set (12%), and abrasion loss (57 mm3). More optimum combinations can easily be determined from the NR/BR blend system models contour plots.

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