Flexible Mobile Phone TX PCMs Film Sheet PCM Polymer

1, Features

• Shape stabilization polymer flexible Phase Change Material

• They are with high LHS density by reform the molecular weight

• They are in macroscopic shape-stabilized, they have no liquid phase

• They are the optimized substance for die-casing into films,sheet and profiles for industries of electronics, automotive and HVAC etc

• They don’t need container like the encapsulated PCMs,they are cost-saver

• Conveniently in usage with simple device to manipulate

• They have high and steady performance in phase change repeating

• They are one of the most promising PCMs in future application fields

2, Descriptions

Polymer-based PCMs can not only keep the macroscopic shape of the material unchanged during phase change, but also increase the content of PCMs in the matrix,which means the increasing of the latent heat storage capacity.

There have below primary methods to acquire solid-solid polymer-based PCMs

1-Physical Blending Method:

  Such materials are prepared by blending organic or inorganic materials with high enthalpy as the medium and polymer materials as a matrix to prepare shape-stabilized composite materials, that is, using the compatibility of the materials, to melt and blend them together to make them a composition homogeneous PCMs, which can combine the advantages of organic and inorganic materials to achieve the dual purpose of high phase change enthalpy and stable shape.

Disadvantages by physical blending:

• It is difficult to overcome the problem of phase separation between the low melting point working substance and the carrier matrix through diffusion and migration after melting

• After a certain amount of carrier is added to the working substance, the heat storage capacity of the entire material is reduced, and the energy density of the material is small

• After the carrier is mixed with the working substance, the mechanical properties of the material are reduced, and the hardness, strength, flexibility and other properties of the entire material are greatly lost, so that the life span is shortened and the working substance is easily aging (AGING), which causes the working substance to leak and pollute the environment.

2-Molecular grafting method:

    By chemical reaction, the chain end of the long chain of crystalline polymer is grafted onto another skeleton polymer which has higher melting point, and strong strength and stable structure. Then during the heating process, when the low melting point crystalline polymer branched When transiting from the crystalline state to the amorphous state, thanks to its grafted high-melting polymer carrier, this kind of polymer framework supports the structure of the entire material and limits the macroscopic flow of low-melting polymers,thereby The material still maintains its stabilized shape as a entirety, so that the phase change of the low melting point polymer branch chain can be used to achieve the purpose of solid phase change energy storage

The premise of grafted crystalline polymer PCMs is the formation of a chemical bond between the phase change medium and the polymer. Therefore, these PCMs mostly use polyethylene glycol (PEG) with reactive functional groups as the phase change medium, and the matrix is ​​mostly Cellulose and its derivatives with reactive functional groups.

    As our TX-PCMs polymer-base phase change material using the cross-link technology to lock the PCMs firmly with the polymer and  presenting a macroscopic shape-stabilized features which enjoying a much broad range of application, we will introduce this cross-linked crystalline polymer PCMs in our next Page in terms of our FLEXIBILE POLYMER PHASE CHANGE MATERIALS.

3, Application

  Our TX-PCMs PCMs is remaining in solid state during phase transition which enable the materials can be moldable and cut into various shapes in dimensions,and it can be widely use in the lithium-ion battery and electronic device like circuit board,chips, mobile phone, computers etc to provide electronic components with efficiently temperature regulating and protection of the thermal run-away