Melting and crystallization behaviors, morphology, and mechanical properties of β-polypropylene/polypropylene-graft-maleic anhydride/calcium sulfate whisker composites

2015 ◽  
Vol 37 (7) ◽  
pp. 2121-2132 ◽  
Author(s):  
Qiang Dou ◽  
Jiawei Duan
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Calcium Sulfate ◽  
Crystallization Behaviors ◽  
Calcium Sulfate Whisker ◽  
Melting And Crystallization ◽  
Morphology And Mechanical Properties

Effect of Different Kinds of CaSO4 Whisker on the Bending Strength and Hygroscopicity of Gypsum Board

2014 ◽  
Vol 638-640 ◽  
pp. 1322-1325 ◽  
Author(s):  
Chang Chen ◽  
Yu Bin Wang ◽  
Hua Wang ◽  
Qian Qian Deng ◽  
Lei Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Sulfate ◽  
Bending Strength ◽  
Gypsum Board ◽  
Specific Strength ◽  
Different Types ◽  
Calcination Method ◽  
Calcium Sulfate Whiskers ◽  
Calcium Sulfate Whisker ◽  
Properties Of Composites

Different kinds of hemihydrate calcium sulfate whiskers were fabricated by calcination method under the condition of 115-600 °C. And the density, moisture rate and mechanical properties of composites of gypsum and whisker were studied. The specific strength of composites was investigated. The results show that gypsum boards with whisker calcined at 115 °C and 300 °C have the maximum and minimum densities, which are about 1658 kg/m3 and 1604 kg/m3, respectively. Hydration ability of anhydrous calcium sulfate whisker is the strongest. The values of specific strength of gypsum board reinforced by different types of whiskers suggested that the porosity of the composites changed with the different kinds of whiskers, which agreed well with the moisture rate and mechanical properties.

scholarly journals Effects of Calcium Sulfate Whiskers on the Mechanical Properties and Light Transmittance of PE Greenhouse Films

2022 ◽  
Vol 2160 (1) ◽  
pp. 012004
Author(s):  
Runmeng Qiao ◽  
Zhengping Zhong ◽  
Qiao Liu ◽  
Jialei Liu ◽  
Wenqing He
Keyword(s):  
Mechanical Properties ◽  
Calcium Sulfate ◽  
Light Transmittance ◽  
Major Goal ◽  
Tear Strength ◽  
Calcium Sulfate Whiskers ◽  
New Formula ◽  
High Orientation ◽  
Calcium Sulfate Whisker ◽  
Orientation Structure

Abstract Calcium sulfate whisker (CSW) is a kind of fiber crystal material with high orientation structure. The major goal of this research is to study the changes of mechanical properties and light transmittance of PE greenhouse film with different proportions of CSW. The experimental results show that the mechanical properties and light transmittance of PE/CSW films are enhanced compared with the pure PE. For PE/2%CSW, it shows a 18.6% increase in tear strength, a 3.1% increase in luminous transmittance and 17.7% increase in haze. The PE/5%CSW demonstrates a 12.8% higher in tensile strength, a 20.5% higher in tear strength, a 23.9% lower in luminous transmittance and a 53.0% higher in haze. This article gives a new formula to strengthen the mechanical properties of PE greenhouse films and finds the direction for the research and development of astigmatic covering film.

Morphology and Mechanical Properties of Polyoxymethylene and Acrylonitrile-Butadiene-Styrene Blends with Compatibilizer

2015 ◽  
Vol 659 ◽  
pp. 463-467
Author(s):  
Sirirat Wacharawichanant ◽  
Parida Amorncharoen ◽  
Ratiwan Wannasirichoke
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Maleic Anhydride ◽  
Impact Strength ◽  
Interfacial Adhesion ◽  
Acrylonitrile Butadiene Styrene ◽  
Two Phase ◽  
The Impact ◽  
Morphology And Mechanical Properties ◽  
Butadiene Styrene

The effects of polypropylene-graft-maleic anhydride (PP-g-MA) compatibilizers on the morphology and mechanical properties of polyoxymethylene (POM)/acrylonitrile-butadiene-styrene (ABS) blends were investigated. Two types of compatibilizers, PP-g-MA with maleic anhydride 0.50 wt% (PP-g-MA1) and PP-g-MA with maleic anhydride 1.31 wt% (PP-g-MA2) were used to study the interfacial adhesion of POM and ABS. POM/ABS blends with and without PP-g-MA compatibilizer were prepared by an internal mixer and molded by compression molding. Scanning electron microscope (SEM) was used to investigate the morphology of ABS phase in POM matrix. The results found that POM/ABS blends clearly demonstrated a two phase separation of dispersed ABS phase and the POM matrix phase, and ABS phase dispersed as spherical domains in POM matrix in a range of ABS 10-30 wt% and the blends containing ABS more than 30 wt% showed the elongated structure of ABS phase. The addition of PP-g-MA could improve the interfacial adhesion of POM/ABS blends due to the domain size of ABS phase decreased after adding PP-g-MA. The mechanical properties showed that the impact strength of POM/ABS blends decreased in a range of 10-20 wt% and did not change after 20 wt%. The addition of PP-g-MA did not change the impact strength of POM/ABS blends. The Young’s modulus of POM/ABS blends increased up to 30 wt% of ABS and then decreased. While the blends showed the decrease of tensile strength and percent strain at break with increasing ABS content. The addition of PP-g-MA increased the tensile strength of POM/ABS blends in a range of 30-40 wt% of ABS. The above results indicated that the morphology had an effect on the mechanical properties of polymer blends.

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