Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Polymer Blend

The Effect of the Addition of Natural Rubber to (U-PTE) Resin on some Mechanical Properties

Wafaa Mahdi Salih

Engineering and Technology Journal, 2014, Volume 32, Issue 9, Pages 304-310

In this research polymer was prepared from Alkyd resin (U-PTE) with ratio 100% the and natural rubber with ratio 30%. The mixing process was performed by hand lay-up method. Some mechanical properties were studied in this work which included (flexural bending, shear stress, Impact test (charpy method) . the results showed that the addition of natural rubber to (u-pte) resin with this ratio leads to become the brittle behavior and decrease in the shear stress increase the ability of material to impact because the blend materials become elastic .the flexural strength increase of blend two times comparing with its value of pure resin while the result of shear stress value of blend showed decreasing with ratio(43%) but the impact value of blend increased with ratio (20%) with it value before the blending.

Mechanism of Hybrid Reinforcement and its Effect on some Properties of Binary Polymer Blend

Awham M. Hameed; Entihaa G. Daway

Engineering and Technology Journal, 2014, Volume 32, Issue 2, Pages 287-301

The aim of current study is carrying out some modifying in properties of resin material (Unsaturated polyester, UPE) by adding thermoplastic material (polystyrene, PS) with different weight ratios included (0%, 5%, 10%, 15% and 20%) of (PS) to prepare binary polymer blend.
The optimum ratio was selected in terms of the homogeneity case between the two polymers and studying the nature of the surfaces of the prepared materials using the optical microscope. Some mechanical tests were performed to determine the values of impact strength (I.S), ultimate tensile strength (UTS) for all prepared specimens.
The ratio (80/20, weight/weight)% of (UPE/PS) blend was selected and reinforced with fibers volume fraction Фf = 10% using three types of fibers included
(glass fibers (G.F), Carbon fibers (C.F) and hybrid from the two types (5% G.F and 5% C.F). All the above tests were repeated after the reinforcement for comparing the results and studying the behavior of materials under work. The results exhibited that the values of (I.S) increase with increasing of the blending ratio of (PS) while the values of (UTS) decrease at blending ratios (10, 15) % of (PS) and return to increase at the ratio 20% . After the reinforcement, it was found that the composite reinforced with carbon fibers records the highest values of impact strength for un notch specimens while the hybrid composite has the highest value of the ultimate tensile strength comparing with E-glass and carbon fibers composites.