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The polyester composites
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Bài viết "Đánh độ bền tấm đáy tàu cá vỏ composite từ nhựa polyester và sợi thủy tinh" trình bày kết quả tính toán ứng suất và biến dạng của tấm đáy của một tàu cá vỏ composite cụ thể bằng phương pháp giải tích. Kết quả tính toán cho thấy ứng suất sinh ra trên từng lớp nhỏ hơn ứng suất cho phép (xác định bằng thực nghiệm) nên tấm đáy tàu đảm bảo độ bền. Mời các bạn cùng tham khảo chi tiết!
8p
tieuvulinhhoa
22-09-2022
77
4
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In this work, two series of composite materials based on unsaturated polyester (UPE) resin and coffee husk powder were fabricated by a hot pressing method using methyl ethyl ketone peroxide (MEKP) as an initiator. The gel time of UPE resin is 32 2 min with 0.5 wt % of MEKP was determined according to ASTM D2471. The differential scanning calorimetry (DSC) reveals that the curing process should be post-cured.
9p
visherylsandber
28-06-2022
27
5
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The results indicate an increase in the strength with the increasing of strain rate and adding filler content up to 3 wt.%. It also shows an improvement on the fiber/matrix interfacial bonding at the highest strain rate and with adding ZnO nano-filler with 3 wt.%.
8p
cleopatrahuynh
01-06-2020
25
0
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Rice husks were combined with unsaturated polyester resin, synthesized from glycolysed product of poly (ethylene terephthalate) (PET) waste to form rice husk (RH)/polyester composites. PET from post-consumer soft drink bottles was recycled through glycolysis, followed by polyesterified with maleic anhydride and then cross-linked with styrene to produce a formulation for the resin. Characterizations of the synthesized resin were performed by hydroxyl, acid values and Fourier Transform Infra Red (FTIR) techniques.
9p
12120609
01-06-2020
19
0
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In recent years, efforts have been made to produce advanced composite materials in order to lessen environmental impact and to extent sustainability. Traditional materials are largely substituted by composites due to their greater properties like flexural strength, low thermal expansion and high strength.
10p
tohitohi
19-05-2020
20
0
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This paper presents a novel composite material produced by a natural reinforcement subjected to tensile test. The used reinforcement is made of Diss fibers. The Diss (Ampelodesma mauritanica) is a Mediterranean wild plant.
6p
tohitohi
19-05-2020
26
3
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This work is devoted to the experimental study of a glass/polyester composite laminate under impact shock. Based on a thermodynamic approach, the objective is the evaluation of specific interlaminar delamination energy in a multi-layer composite material under impact loading causing damage to it by cracking.
10p
tohitohi
19-05-2020
11
1
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This paper presents the comparative results of a current study on unsaturated polyester resin (UPR) matrix composites processed by filament winding method, with cotton spun yarn of different mass irregularities and two different volume fractions. Physical and mechanical properties were measured, namely ultimate stress, stiffness, elongation%. The mechanical properties of the composites increased significantly with the increase in the fiber volume fraction in agreement with the Counto model.
6p
trinhthamhodang1
16-11-2019
14
1
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In this research, a number of studies had been conducted on the thermal decomposition and fire behavior of kevlar fiber reinforced polymer composites (CP-KUFR). Unsaturated polyester (UPE) was mixed with fire retardant additives including antimony trioxide (Sb2O3), aluminum hydroxide Al(OH)3, chlorinated paraffin (CPs).
6p
viengland2711
23-07-2019
6
0
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In this study has investigated the influence of antimony trioxide (Sb2O3), chlorinated paraffin (PCs) and aluminum hydroxide Al(OH)3 on the flame retardant property of the composite materials (CP) made by unsaturated polyester resin (UPE) and glass fiber (GF).
6p
viengland2711
23-07-2019
14
2
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Trong nghiên cứu này, một số đặc trưng của bột đá khô và ướt được khảo sát bao gồm thành phần khoáng, thành phần hóa học, phân bố kích thước hạt, hình thái học và so sánh với bột đá thương phẩm. Ngoài ra, một số tính chất cơ học như kéo, uốn, va đập, độ cứng và khả năng chịu tải trọng nén của composite từ nhựa polyester không no, sợi thủy tinh và bột đá cũng được khảo sát nhằm đánh giá khả năng thay thế bột đá thương phẩm trong chế tạo một số sản phẩm composite như song chắn rác, nắp hố ga và lươn giao thông.
6p
vidanh95
13-12-2018
88
2
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There are many formulas proposed by different authors in order to determine elastic modules for composite filler particles. This article aims to present the experiment’s results and to review some formulas for determining Young’s modulus of elasticity E of the polyester filler titanium dioxide particles composite. The results showed that there was a relatively good fit between theory and practice of some formulas.
7p
thienthanquydu
17-10-2018
21
0
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Unsaturated polyester composites reinforced by glass fiber and by hybrid reinforcement glass fiber - lung fiber with cellulose microfiber (MFC) were prepared and investigated. Tensile and flexural strengths of material reached the highest value at polymer composite with 48 %w glass fiber mat and 0.3 %w MFC (208.33 MPa and 243.6 0 MPa), while the highest impact strength reached 212.48 kJ/m2 at composite containing 48 %w glass fiber but 0.5 %w MFC.
7p
cumeo3000
01-08-2018
45
1
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Khả năng ứng dụng của phần thân cây dừa hiện nay rất hạn chế (chủ yếu được xẻ thành ván sử dụng trong các kết cấu không quan trọng) trong khi chúng chiếm tỉ trọng rất lớn trong toàn bộ cây dừa. Các nghiên cứu về composite từ sợi xơ dừa (lấy từ vỏ quả dừa) là khá phổ biến ở trong nước cũng như trên thế giới. Trong nghiên cứu này, vật liệu composite làm từ nhựa polyester không no và bột thân cây dừa được chế tạo, thử nghiệm và đánh giá cơ tính.
7p
advanger1
06-05-2018
71
5
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This paper presents the result of research on equipment development of vacuum injection molding technique for preparation the chopped bamboo fiber polymer composite and some properties of obtained composite material. For the vacuum injection molding technique, firstly the dry fibers were plated in the mold. Then the mold was closed by the vacuum bag, the air inside the mold was sucked out by a vacuum pump, due to the difference of the pressure in side and outside the mold, the polymer liquid was transferred to the closed mold and impregnated the bamboo fiber.
7p
uocvong01
24-09-2015
66
4
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This paper present the results of research on designing mold for vacuum infusion technique for preparation the polymer composite material. Specimens of varrious methods of vacuum technique have been prepared and their mechanical and structural properties have been studied. The results show that material obtained from vacuum assisted technique have a preciously mechanical properties, increased in average 45% in comparison with hand lay up method. The scanning electronic microscopy has been used for investigation on void appearance of composite materials.
8p
uocvong01
24-09-2015
79
7
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Sau hơn 30 năm vật liệu composite đã phát triển rất mạnh mẻ về số lượng, sự phong phú về chủng loại củng như tính năng sử dụng. Vật liệu composite được coi là vật liệu của thế kỷ 21 bởi vì các tính chất nổi bật
63p
hoangyen999
10-05-2013
246
76
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Composite is a material composed of two or more component materials to obtain better properties. 3-phase composite is usually added with reinforced fibers and particles. This report presents an experimental study on the bending of some 3-phase composite plates for Vietnam’s shipbuilding industry. The studied composite is made of polyester matrix, glass fiber and titanium dioxide particle (TiO2). The numerical study, in which the interaction between the matrix and particle is taken into account, shows good agreement with the experiment. ...
5p
tuanlocmuido
19-12-2012
50
2
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Polyesters are being widely applied in different fields of life due to their excellent characteristics. A book "Polyester" comprises 16 chapters covering synthesis, characterization and applications of polyester. Chemical and biological methods for synthesis of polyester were one of the most important points of research added. Mechanical, physical, chemical characterizations and improvement of polyester were also explored.
0p
cucdai_1
16-10-2012
90
13
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