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Process for preparing thermally conductive oriented uhmwpe products and products obtained therefrom

A technology with high thermal conductivity and process technology, applied in the field of high thermal conductivity oriented ultra-high molecular weight polyethylene products and its preparation, can solve the problems of energy-intensive process, troublesome, and limited commercial applications

Inactive Publication Date: 2016-10-12
RELIANCE INDUSTRIES LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the currently reported processes are energy intensive and cumbersome, limiting their use in commercial applications

Method used

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  • Process for preparing thermally conductive oriented uhmwpe products and products obtained therefrom
  • Process for preparing thermally conductive oriented uhmwpe products and products obtained therefrom
  • Process for preparing thermally conductive oriented uhmwpe products and products obtained therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Films were prepared using three polymer samples with the following properties (Table 1), maintaining different draw ratios. Although the RSV and molecular weight (MW) of samples 1 and 2 were similar, sample 2 had a higher molecular weight distribution than sample 1. The RSV, MW and MWD of sample 3 are higher than those of samples 1 and 2.

[0037]Table 1

[0038]

[0039] Table 2 shows the stretch film sample preparation conditions and their tensile and thermal properties. The highest stretch ratio is the limit beyond which the film will break.

[0040] From sample 1, it can be seen that the axial thermal conductivity of the prepared stretched film increases with the increase of the tensile modulus, which is related to the stretch ratio (Table 2). The results show that Polymer Sample 2 can be stretched by 128.6 times and has a thermal conductivity of 128.2 W / mK, while the tensile modulus is lower than that of Polymer Sample 1 stretched film with a lower draw ratio...

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PUM

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Abstract

The present disclosure relates to a process for preparing of high thermal conductivity and high heat capacity oriented ultrahigh molecular weight polyethylene (UHMWPE) product. The process includes feeding UHMWPE through rollers to obtain a pre-laminate which is further hot stretched to obtain the oriented UHMWPE product having high thermal conductivity and high heat capacity. The temperature of stretching is maintained below the melt temperature of the UHMWPE throughout the entire process. There is also provided a high thermal conductivity and high heat capacity oriented UHMWPE product prepared by the process of the present disclosure. The oriented UHMWPE product is characterized in the axial thermal conductivity in the range of 70 to 200 W / mK, transverse direction thermal conductivity in the range of 0.022 to 0.045W / mK and heat capacity in the range of 6 to 25 MJ / m3K.

Description

technical field [0001] The invention relates to a high thermal conductivity oriented ultra-high molecular weight polyethylene product and its preparation. [0002] definition [0003] The following terms used in the present invention generally have the meanings specified below, unless otherwise indicated in the context in which they are used. [0004] Disentanglement: "Disentanglement" refers to a homopolymer or copolymer of ultra-high molecular weight polyethylene-ethylene, which has the following characteristics: the molar mass is between 300,000 and 20 million; the degree of crystallinity is higher than 75%; The heat of fusion is higher than 200J / g, and the bulk density is between 0.01 and 0.3g / cc, wherein, the polyethylene chains have low entanglement or complete disentanglement. [0005] Oriented Product: "Oriented Product" means filaments, sheets, films, tapes, or other polymer products having oriented polymer chains. [0006] Stretch Ratio: "Stretch Ratio" refers to ...

Claims

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Application Information

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IPC IPC(8): C08F6/26
CPCB29C43/003B29C43/146B29C43/24B29C55/005B29C55/065B29C55/18B29K2023/0683B29K2105/0047B29K2105/162B29K2105/165B29K2995/0013C08J5/18C08L23/02C08L2203/12C08L2207/068C08K3/013B29K2105/167B29L2007/008C08F10/02C08F110/02C08F2500/01C08F2500/04C08F2500/18C08F2500/26
Inventor A·B·马图尔S·V·卡达姆S·S·R·甘达姆U·S·萨特帕蒂K·R·萨尔马N·F·帕特尔G·M·梅赫塔Y·M·阿明A·K·P·沙阿V·K·帕特尔R·V·扎斯拉D·K·舒克拉A·I·帕瑞卡
Owner RELIANCE INDUSTRIES LIMITED
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