Improved thermal conductivity of graphene encapsulated poly(methyl methacrylate) nanocomposite adhesives with low loading amount of graphene

2014 ◽  
Vol 94 ◽  
pp. 147-154 ◽  
Author(s):  
Jae-Yong Choi ◽  
Sang Woo Kim ◽  
Kuk Young Cho
Keyword(s):  
Thermal Conductivity ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
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scholarly journals The thermal conductivity of poly(methyl methacrylate)

1962 ◽  
Vol 6 (23) ◽  
pp. S32-S33 ◽  
Author(s):  
Robert H. Shoulberg ◽  
John A. Shetter
Keyword(s):  
Thermal Conductivity ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate

scholarly journals Thermal Conductivity Enhancement Derived from Poly(Methyl Methacrylate)-Grafted Carbon Nanotubes in Poly(Methyl Methacrylate)/Polystyrene Blends

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1347 ◽  
Author(s):  
Jaehyun Wie ◽  
Jooheon Kim
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Methyl Methacrylate ◽  
Multiwalled Carbon Nanotubes ◽  
Thermal Conductivity Enhancement ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate ◽  
Conductivity Enhancement ◽  
Conductive Properties ◽  
Enhanced Thermal Conductivity

This paper presents a method to enhance thermal conductivity using poly(methyl methacrylate)(PMMA), polystyrene(PS) blends, and incorporation of multiwalled carbon nanotubes (MWCNTs). MWCNTs are selectively localized in PMMA phase to improve conductive properties. In addition, Surface of MWCNTs was treated with PMMA to enhance affinity between matrix and filler. PMMA grafting helps filler localization on matrix phase. Composites using two polymers enhanced thermal conductivity by ~11% compared with composites using only PS or PMMA. Also, PMMA grafting on the surface of MWCNTs enhanced thermal conductivity by ~13% compared with samples without PMMA grafting.

scholarly journals STUDY THERMAL BEHAVIOR OF HEAT CURE POLY (METHYL METHACRYLATE) REINFORCED BY BAMBOO AND RICE HUSK POWDERS FOR DENTURE APPLICATIONS

2019 ◽  
Vol 11 (4) ◽  
pp. 417-425
Author(s):  
Jawad K. Oleiwi ◽  
Qahtan Adnan Hamad ◽  
Hadil Jabbar Abdul Rahman
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Methyl Methacrylate ◽  
Thermal Behavior ◽  
Rice Husk ◽  
Weight Fraction ◽  
Scanning Calorimetry ◽  
Poly Methyl Methacrylate ◽  
Heat Cure ◽  
Naoh Solution

The present research, studies the effect of adding two different types of reinforcing powders, which included: Bamboo (Ba) and Rice Husk (RH), that added with different weight fractions (2, 4, 6 and 8 wt. %), and with the selected size particles of (25µm and 75µm) on thermal behavior of heat Cure Poly (Methyl Methacrylate) such as thermal conductivity and thermal diffusivity in addition to the differential scanning calorimetry (DSC) analysis  and these tests were accomplished at temperature of laboratory. The poly Methyl Methacrylate properties which reinforced by (Bamboo and Rice Husk) powders are mainly influenced by the interfacial adhesion strength between the powders and the matrix, and in order to get better correlation between the natural powder and PMMA matrix, so the powders were treated with alkali (sodium hydroxide NaoH) solution prior to use as reinforcement materials. The results showed that the values of the thermal conductivity and thermal diffusivity increased with increasing of the weight fraction for both particle sizes (25 µm and 75 µm) of natural powders.

Thermal Conductivity Measurements of Ultra-Thin Amorphous Poly(Methyl Methacrylate) (PMMA) Films

2013 ◽  
Author(s):  
Ickchan Kim ◽  
Mihai G. Burzo ◽  
Pavel L. Komarov ◽  
Peter E. Raad
Keyword(s):  
Thin Film ◽  
Thermal Conductivity ◽  
Methyl Methacrylate ◽  
Data Storage ◽  
Thermophysical Properties ◽  
Dielectric Materials ◽  
Magnetic Data ◽  
Poly Methyl Methacrylate ◽  
Wide Range ◽  
Intrinsic Thermal Conductivity

As technology progresses towards smaller and higher density microelectronic devices, we are faced with working with atomic-scale dimensions that present us with challenges but also opportunities. Since mechanical and chemical properties of ultra-thin polymeric films can vary dramatically from their bulk, the thermophysical properties of thin films are also expected to vary. Ultra-thin poly(methyl methacrylate) (PMMA) films have been the focus of numerous investigations in recent years as a data storage medium. Employing Atomic Force Microscopy (AFM) technology, it is possible to store data bits by heating a target zone until it melts, which leaves a nano-dimple indentation in the PMMA polymer film. The AFM technology has great potential because it possesses considerable data density when compared to conventional magnetic data storage. Since the amount of heat that needs to be used to melt the nanoscale region of the polymer needs to be precisely controlled, knowing the thermophysical properties of such films is a critical factor in advancing this technology. It is known that heat carriers such as electrons and phonons in metallic and dielectric materials, respectively, are influenced by the “size effect” in the micro and nano-scale dimensions. Therefore, a goal for this investigation is to determine whether any dependence exists between the PMMA’s film thickness and its thermal conductivity. In this work we investigated whether a “scale effect” on intrinsic thermal conductivity actually exists for amorphous PMMA films with thicknesses ranging from 40 nm to 2 μm. The approach is based on the transient thermoreflectance (TTR) method, where the change in the surface temperature is measured by detecting the change in the reflectivity of the sample. The sample is heated by laser irradiation and probed using a continuous-wave laser that detects changes in the reflectivity of the heated material surface. The experimentally obtained transient temperature signature is then used to extract unknown values of thermal properties. Based on our previous experience with measuring a wide range of thin-film materials and the data available in the literature, we expected a lower thin-film thermal conductivity as compared to the bulk value. Surprisingly, the results show that the intrinsic thermal conductivity of layers thinner than 40 nm PMMA film deposited on native silicon oxide is about three times higher than the bulk PMMA value. A similar trend was observed for all ultra-thin (sub 100 nm) films.

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