Flame Retardance and Mechanical Properties of 1,3 Propylene Glycol Based Unsaturated Polyester

In this paper, a kind of unsaturated polyester resin (UPR) was prepared by using renewable soybean oil, glycerol, propylene glycol and anhydride as raw materials. In this process, soybean oil firstly reacted with glycerol to yield monoglyceride, then, propylene glycol partly replaced by monoglyceride reacted with anhydride to yield UPR. The effect of weight content of monoglyceride on the mechanical properties of UPR was systematically studied. Results showed that with the increase of weight content of monoglyceride, the curing exothermic peak of UPR was dropped; the curing shrinkage and flexural strength and tensile strength were decreased. But the impact strength and the tensile elongation were increased. When the weight content of monoglyceride was 40%, the impact strength and the tensile elongation could reach 102.074 kJ/m2 and 27.69%, respectively. The prepared UPR had some advantages such as low-cost, flexible and high production efficiency.

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A Study of Some Mechanical and Physical Properties for Palm Fiber/Polyester Composite

Engineering and Technology Journal ◽

10.30684/etj.v38i3b.598 ◽

2020 ◽

Vol 38 (3B) ◽

pp. 104-114

Author(s):

Samah M. Hussein

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Dielectric Constant ◽

Date Palm ◽

Volume Fraction ◽

Unsaturated Polyester ◽

Dielectric Strength ◽

Palm Fiber ◽

Mechanical And Physical Properties ◽

Polyester Composite

This research has been done by reinforcing the matrix (unsaturated polyester) resin with natural material (date palm fiber (DPF)). The fibers were exposure to alkali treatment before reinforcement. The samples have been prepared by using hand lay-up technique with fiber volume fraction of (10%, 20% and 30%). After preparation of the mechanical and physical properties have been studied such as, compression, flexural, impact strength, thermal conductivity, Dielectric constant and dielectric strength. The polyester composite reinforced with date palm fiber at volume fraction (10% and 20%) has good mechanical properties rather than pure unsaturated polyester material, while the composite reinforced with 30% Vf present poor mechanical properties. Thermal conductivity results indicated insulator composite behavior. The effect of present fiber polar group induces of decreasing in dielectric strength, and increasing dielectric constant. The reinforcement composite 20% Vf showed the best results in mechanical, thermal and electrical properties.

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Physical and mechanical properties of unsaturated polyester resin matrix from recycled PET (based PG ) with corn straw fiber

Journal of Applied Polymer Science ◽

10.1002/app.51305 ◽

2021 ◽

pp. 51305

Author(s):

Nora Abigail Wilson García ◽

Jorge Luis Almaral Sánchez ◽

Ramón Álvaro Vargas Ortiz ◽

Abel Hurtado Macías ◽

Nelly Flores Ramírez ◽

...

Keyword(s):

Mechanical Properties ◽

Polyester Resin ◽

Unsaturated Polyester ◽

Physical And Mechanical Properties ◽

Unsaturated Polyester Resin ◽

Resin Matrix ◽

Corn Straw ◽

Recycled Pet

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Reuse potential of functionalized thermoplastic waste as reinforcement for thermoset polymers: Mechanical properties and erosion resistance

Journal of Composite Materials ◽

10.1177/00219983211037045 ◽

2021 ◽

pp. 002199832110370

Author(s):

Tihomir Kovačević ◽

Saša Brzić ◽

Melina Kalagasidis Krušić ◽

Jovica Nešić ◽

Ljubica Radović ◽

...

Keyword(s):

Mechanical Properties ◽

Activation Energy ◽

Erosion Resistance ◽

Unsaturated Polyester ◽

Chemical Activation ◽

Mining Industry ◽

Dynamic Mechanical Properties ◽

Variable Loading ◽

Polymer Waste ◽

Dynamic Mechanical

Two types of polymer waste materials, poly(ethylene terephthalate) (PET) and polycarbonate based Colombian Resin (CR-39), were used for the designing of fully recycled composite materials. Waste PET was employed for the synthesis of thermoset unsaturated polyester resin (UPR), while CR-39 was used as reinforcement in the UPR matrix. Prior to mixing, CR-39 particles were subjected to oxidation and chemical activation using acids/base and ethanol amine, respectively. The effect of the modifier type and variable loading of the activated CR-39 particles on mechanical and dynamic-mechanical properties of the corresponding composites was investigated. The greatest improvement in the tensile and flexural strength of UPR resin was achieved with the composite containing 0.5 wt% of amine activated filler particles, 96.0% and 62.2%, respectively. The Arrhenius equation was used to calculate the activation energy for glass transition from dynamic mechanical properties measured at various frequencies. The activation energy of the main transition for UPR resin and composites were calculated to be 173 and 350 kJ·mol−1 indicating that reinforcement results in an increase in the energy barrier to macromolecules viscoelastic relaxation. In addition, erosion resistance was studied during exposure of samples to cavitation tests. According to the obtained results, these materials can be applied in construction and mining industry.

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