Thermal stability of ZrO_2 nanoparticle-polymer composite volume gratings incorporating multifunctional chain transfer agents

2014 ◽  
Author(s):  
Jinxin Guo ◽  
Ryuta Fujii ◽  
Takanori Ono ◽  
Yasuo Tomita
Keyword(s):  
Thermal Stability ◽  
Polymer Composite ◽  
Chain Transfer ◽  
Thermal Stability Of ◽  
Transfer Agents ◽  
Volume Gratings

Nanoparticle polymer composite volume gratings incorporating chain transfer agents for holography and slow-neutron optics

2014 ◽  
Vol 39 (12) ◽  
pp. 3453 ◽  
Author(s):  
Ryuta Fujii ◽  
Jinxin Guo ◽  
Jürgen Klepp ◽  
Christian Pruner ◽  
Martin Fally ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Chain Transfer ◽  
Slow Neutron ◽  
Neutron Optics ◽  
Transfer Agents ◽  
Volume Gratings

scholarly journals Effect of incorporating different types of Sentang tree waste particle on the thermal stability of Wood Polymer Composite (WPC)

2022 ◽  
Vol 951 (1) ◽  
pp. 012077
Author(s):  
A M Zakaria ◽  
M A Jamaludin ◽  
M Z Zakaria ◽  
R Hassan ◽  
S A Bahari
Keyword(s):  
Thermal Stability ◽  
Polymer Composite ◽  
Paper Industry ◽  
Vital Role ◽  
Chemical Compositions ◽  
Wood Polymer ◽  
Twin Screw ◽  
Waste Particles ◽  
Thermal Stability Of ◽  
Wood Polymer Composite

Abstract This article presents the potential use of tree waste materials such as the leaves (L), branches (B) and trunks (T) of Azadirachta excelsa (Sentang) tree in the production of wood polymer composite (WPC). The WPC was fabricated from high-density polyethylene (HDPE) as bonding matrix, maleic anhydride (MA) as coupling agent, and Sentang tree waste particles (L, B and T) as filler, prepared using twin-screw extruder followed by injection moulding machine. The effects of incorporating these types of Sentang tree waste particle (at 35% and 45% particles loading by weight) on the thermal stability of WPC were reported. The chemical compositions of L, B and T were also determined and their influences on the thermal stability of WPC were discussed. The thermal behaviour was determined by using thermogravimetric analysis (TGA), whereas the chemical analysis using Technical Association of the Pulp and Paper Industry (TAPPI) methods. The addition of these tree waste particles as filler has increased the thermal stability of WPC compared to virgin HDPE (without any particle incorporation). The highest mass loss was experienced by virgin HDPE. It was also observed that chemical compositions of the particles played vital role in influencing the thermal stability of WPC.

Improved thermal stability of volume holograms recorded in nanoparticle–polymer composite films

2008 ◽  
Vol 33 (15) ◽  
pp. 1750 ◽  
Author(s):  
Yasuo Tomita ◽  
Toshihiro Nakamura ◽  
Atsushi Tago
Keyword(s):  
Thermal Stability ◽  
Polymer Composite ◽  
Composite Films ◽  
Volume Holograms ◽  
Thermal Stability Of

scholarly journals The thermal stability of poly(methyl methacrylate) prepared by raft polymerisation

2008 ◽  
Vol 73 (8-9) ◽  
pp. 915-921 ◽  
Author(s):  
Lynne Katsikas ◽  
Milena Avramovic ◽  
Betancourt Cortés ◽  
Milos Milovanovic ◽  
Melina Kalagasidis-Krusic ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Double Bonds ◽  
Poly Methyl Methacrylate ◽  
Reversible Addition ◽  
Raft Agent ◽  
Thermal Stability Of

Poly(methyl methacrylate), PMMA, was prepared by reversible addition-fragmentation chain transfer, RAFT, polymerisation using 2-(2-cyanopropyl)-dithiobenzoate, CPDB, as the RAFT agent. The thermal stability of the resulting polymer approached that of anionically prepared PMMA, as determined by thermogravimetry. This was the consequence of the RAFT prepared polymer having no head-to-head links and no chain end double bonds, which are responsible for the relatively low thermal stability of radically prepared PMMA.

Biodegradable composites of waste expanded polystyrene with modified neem oil for packaging applications

2021 ◽  
pp. 009524432110061
Author(s):  
NG Salini ◽  
BG Resmi ◽  
Rosy Antony
Keyword(s):  
Thermal Stability ◽  
Composite Film ◽  
Polymer Composite ◽  
Expanded Polystyrene ◽  
Synthetic Approach ◽  
Neem Oil ◽  
Segmental Mobility ◽  
Polymer Composite Film ◽  
Effective Manner ◽  
Thermal Stability Of

Polymer composite film containing expanded polystyrene wastes, poly (ethylene-co-vinyl acetate), epoxidized neem oil and cassava starch was prepared by solution casting technique. The composite film was characterized by FTIR, NMR, X-ray diffraction, and FESEM analysis. The thermal stability of the polymer composite film was studied by TGA and DSC. Melting point, glass transition temperature and cold-crystallization temperature of the composite films were found to decrease with increasing percentages of epoxidized neem oil plasticizer, which point towards the enhanced segmental mobility of the polymer chain. TGA results show that plasticization has enhanced the thermal stability of the polymer composite. The prepared films show improved percentage elongation with moderate tensile strength and Young’s modulus. Soil burial test was adopted to check the biodegradability. The lower values of water absorption indicate the water-resistant nature of the films. This green synthetic approach offers a simple means of up-cycling waste thermocol in a cost-effective manner which imparts partial biodegradability with potential for packaging film and eliminates the usage of toxic chemicals.

scholarly journals Thermal Analysis of Oil Shale Ash-filled High-density Polyethylene Composites

2021 ◽  
pp. 59-65
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Thermal Properties ◽  
Polymer Composite ◽  
High Density Polyethylene ◽  
Oil Shale ◽  
Neat Polymer ◽  
Oil Shale Ash ◽  
Shale Ash ◽  
Thermal Stability Of

Thermal analysis was performed to evaluate the impact of the addition of oil shale ash (OSA) to high-density polyethylene (HDPE) polymer matrix using differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA). Extrusion and press molding processes were used to compound the OSA-filled HDPE polymer composites containing 0, 5, 15 and 25 wt% OSA, for which the thermal properties and the characteristics of the composites were studied. Investigation of the thermal properties of the OSA-HDPE composite is necessary for selecting processing conditions and the appropriate application field. The DSC results demonstrated that OSA addition only marginally affected the glass transition temperature Tg of the composite formulations. The melting temperature Tm showed a decreasing trend with increased OSA fraction, while the crystallization temperature Tcryst showed an increasing trend. The heat of fusion ∆Hm, the heat of crystallization ∆Hcryst and the percentage of crystallinity decreased on the addition of OSA filler. The TGA results demonstrated that the thermal stability of the polymer composite matches that of the neat polymer behavior up to 350 °C after which the thermal stability of the filled polymer composite increases with increased filler content. Above 360 °C, the weight loss of the neat polymer as well as of the polymer composite is accelerated up to 480 °C where all tested samples become fully degraded.

Nanomechanical properties and thermal stability of recycled cellulose reinforced starch-gelatin polymer composite

2014 ◽  
Vol 132 (14) ◽  
pp. n/a-n/a ◽  
Author(s):  
Wendy Rodríguez-Castellanos ◽  
Francisco Javier Flores-Ruiz ◽  
Fernando Martínez-Bustos ◽  
Fernando Chiñas-Castillo ◽  
Francisco Javier Espinoza-Beltrán
Keyword(s):  
Thermal Stability ◽  
Polymer Composite ◽  
Nanomechanical Properties ◽  
Thermal Stability Of

Effects of recovered brown alumina filler loading on mechanical, hygrothermal and thermal properties of glass fiber–reinforced epoxy polymer composite

2021 ◽  
Vol 29 (9_suppl) ◽  
pp. S1092-S1102
Author(s):  
P Sabarinathan ◽  
VE Annamalai ◽  
K Rajkumar ◽  
K Vishal
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Flexural Strength ◽  
Glass Fiber ◽  
Polymer Composite ◽  
Filler Loading ◽  
Matrix Cracking ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Thermal Stability Of

This study investigates the efficiency of recovered brown alumina (RBA) particles filled in epoxy glass-fiber composites. The RBA particles were obtained from grinding wheel rejects with the help of the mechanical crushing process. Recovered particles finer than 120 grit were used as particulate filler for composite preparation. Composites were processed through a hand-layup technique by varying RBA filler loading percentages (0, 5, 10, 15, and 20 wt.%) in a glass fiber–reinforced epoxy matrix. Physical, mechanical, water absorption, and thermal properties of the composites were tested experimentally. By suitable addition of RBA, it is possible to tailor the shore-D hardness, tensile modulus, flexural strength, flexural modulus, and maximum degradation temperature. The 20%-filled RBA composite shows the maximum flexural strength of 382 MPa, and the shore-D hardness value was 85. The fracture surface shows a failure mechanism dominated by matrix cracking and debonding of fiber/particles from the interface. Hygrothermal testing of the RBA20-filled composite reveals 9% and 4% reduction in tensile and flexural properties. The thermal stability of the glass fiber–reinforced composite improves as the filler percentage increases. Maximum thermal stability of 435°C was observed in 20%-filled RBA polymer composite.

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