This review presents various types of epoxy resins and curing agents commonly used as composite matrices. A brief review of cross-linking formation and the process of degradation or decomposition of epoxy resins by pyrolysis and solvolysis is also discussed. Mechanical engineers are given a brief overview of the types of epoxy resin, which are often applied as composite matrices considering that they currently play a large role in the research, design, manufacturing, and recycling of these materials.

Pemanfaatan Teknologi Informasi (TI) dalam proses penyampaian informasi mengalami perkembangan pesat. Saat ini, teknologi terbaru yang digunakan dalam penyampaian informasi adalah teknologi Augmented Reality (AR). Pada teknologi AR, pengguna dapat menvisualisasikan objek atau benda bersejarah dalam bentuk 3 dimensi. AR memiliki kelebihan bersifat interaktif dan real time sehingga AR banyak diimplementasikan di bidang pendidikan sebagai media untuk memperkenalkan benda-benda bersejarah yang merupakan warisan budaya. Benda-benda bersejarah sebagai  warisan budaya termasuk ke dalam katagori cagar budaya. Benda cagar budaya memiliki arti khusus bagi sejarah, ilmu pengetahuan, pendidikan, agama, dan kebudayaan. Selain itu, benda cagar budaya juga memiliki nilai budaya bagi penguatan kepribadian bangsa. Mengingat pentingnya keberadaan cagar budaya tersebut, maka informasi mengenai keberadaan benda cagar budaya harus diketahui oleh masyarakat. Tujuan pada paper ini adalah untuk mereview penggunaan teknologi AR yang bersifat interaktif dan real time dalam memperkenalkan benda cagar budaya kepada masyarakat. Pada bagian selanjutnya akan dibahas mengenai penelitian-penelitian yang relevan dalam penggunaan teknologi AR. Selain itu juga akan dibahas mengenai teknik dan metodologi penelitian dalam pembuatan aplikasi AR tersebut.

Nozzle hole diameter of 3D printer (3DP) can be varied to obtain required product quality as well as to reduce manufacturing times. The use of larger diameter may accelerate manufacturing times of products, yet the product quality, including the mechanical properties, still needs to be investigated profoundly. The purpose of this work is to investigate experimentally the effect of nozzle hole diameter of 3DP to the surface quality, accuracy, and the strength of the product. The specimens were manufactured by fused deposition modelling (FDM) 3D printing using polylactic acid (PLA) as the filaments.Bed temperature, extruder temperature and printing speed were set to be 60∘C, 200∘C and 80 mm/s respectively. The thickness of each layer was set at the ratio of 20% to the nozzle hole diameter. Infill pattern was determined by using line type of 100%. Nozzle hole diameter of 0.3, 0.4, 0.5 and 0.6mmwas compared in thiswork. The results show that bigger nozzle hole diameter enhanced the density and tensile strength of the products thought it was not linearly correlation.

Carbon fiber is a popular polymer reinforcing material for forming carbon fiber reinforced polymer composites (CFRP) as a construction material under high loading. The use of this composite has spread in various fields of technology with a quite large production volume annually. Consequently, when the life span of the composite has run out it will leave composite waste and brought up CFRP recycling cases as a dare for scientists and engineers. Research on carbon fiber reclamation from CFRP materials has been carried out with the main purpose of taking and reusing carbon fiber. Several CFRP recycling methods have been investigated in laboratories and applied successfully to business but the capacity of production is not comparable with the addition of CFRP composite waste each year. High recycling energy is one of the main reasons constrained this waste recycling business. Recycled carbon fiber (r-CF) also shows a decrease in performance compared to virgin carbon fiber (v-CF) with a varied distribution of degradation according to the recycling method applied. However, reuse of r-CF in the form of short fibers in a composite materials under medium and low loads has been thoroughly tested and applied with promising results as a reinforcement for new composites

Thermal and mechanical properties of polylactic acid (PLA) and bagasse carboxymethyl cellulose (CMC B ) composite by adding isosorbide diesters AIP Conference Proceedings 1664, 060006 (2015)