Novel heat durable electromechanical films: Cellular film making from polymers

Ann-Mari Savijärvi; Mika Paajanen; Eetta Saarimäki; Hannu Minkkinen

doi:10.1109/ISE.2005.1612322

Novel heat durable electromechanical films: Cellular film making from polymers

Ann-Mari Savijärvi, Mika Paajanen, Eetta Saarimäki, Hannu Minkkinen

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

A cellular electromechanical film has been developed from both, cyclo-olefin polymer (COP) and cyclo-olefin copolymer (COC). Cyclic olefins are thermally more durable than polypropylene (PP), which is the basis for the existing electromechanical film. This paper concentrates on studying cellular film making of the electromechanical film from cyclo-olefin compounds and a mineral filler. Due to the stiffness of the COP and COC as well as challenging film processing, the high temperature grade of cyclo-olefins were blended with a lower temperature polymer in different ratios in order to increase the film for inability in solid state processing. The effect of a blended polymer and its ratio in the manufactured compounds was studied from the cast films by a dynamical mechanical thermal analysis (DMTA). The blends were extruded in to a form of a cast film and drawn biaxially using a laboratory scale stretcher or sequentially on a small pilot line in MD and consequently using an Instron extensometer in TD. One COP based blend manufactured was drawn in TD on a small pilot line stenter to demonstrate film making on a film line similar to commercial film making units. Voided structure of the biaxially drawn films was improved by a gas diffusion expansion treatment and evaluated from scanning electron microscope (SEM) micrographs. Film samples were electrostatically charged and metallized and consequently, the level of the electromechanical sensitivity was measured from these blend based films by a dynamical method. It was shown that a cellular electromechanical film with an electromechanical coefficient around 10-15 pC/N durable at high temperatures of around 80-110°C, can be manufactured from the COP and the COC based blends.

Original language	English
Title of host publication	12th International Symposium on Electrets, ISE '12
Publisher	IEEE Institute of Electrical and Electronic Engineers
Pages	75-78
ISBN (Print)	978-0-7803-9116-1
DOIs	https://doi.org/10.1109/ISE.2005.1612322
Publication status	Published - 2005
MoE publication type	A4 Article in a conference publication
Event	12th International Symposium on Electrets, ISE-12 - Salvador, Brazil Duration: 11 Sept 2005 → 14 Sept 2005

Conference

Conference	12th International Symposium on Electrets, ISE-12
Country/Territory	Brazil
City	Salvador
Period	11/09/05 → 14/09/05

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10.1109/ISE.2005.1612322

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@inproceedings{35c2beb5a84e4f15b461bce118f00255,

title = "Novel heat durable electromechanical films: Cellular film making from polymers",

abstract = "A cellular electromechanical film has been developed from both, cyclo-olefin polymer (COP) and cyclo-olefin copolymer (COC). Cyclic olefins are thermally more durable than polypropylene (PP), which is the basis for the existing electromechanical film. This paper concentrates on studying cellular film making of the electromechanical film from cyclo-olefin compounds and a mineral filler. Due to the stiffness of the COP and COC as well as challenging film processing, the high temperature grade of cyclo-olefins were blended with a lower temperature polymer in different ratios in order to increase the film for inability in solid state processing. The effect of a blended polymer and its ratio in the manufactured compounds was studied from the cast films by a dynamical mechanical thermal analysis (DMTA). The blends were extruded in to a form of a cast film and drawn biaxially using a laboratory scale stretcher or sequentially on a small pilot line in MD and consequently using an Instron extensometer in TD. One COP based blend manufactured was drawn in TD on a small pilot line stenter to demonstrate film making on a film line similar to commercial film making units. Voided structure of the biaxially drawn films was improved by a gas diffusion expansion treatment and evaluated from scanning electron microscope (SEM) micrographs. Film samples were electrostatically charged and metallized and consequently, the level of the electromechanical sensitivity was measured from these blend based films by a dynamical method. It was shown that a cellular electromechanical film with an electromechanical coefficient around 10-15 pC/N durable at high temperatures of around 80-110°C, can be manufactured from the COP and the COC based blends.",

author = "Ann-Mari Savij{\"a}rvi and Mika Paajanen and Eetta Saarim{\"a}ki and Hannu Minkkinen",

year = "2005",

doi = "10.1109/ISE.2005.1612322",

language = "English",

isbn = "978-0-7803-9116-1",

pages = "75--78",

booktitle = "12th International Symposium on Electrets, ISE '12",

publisher = "IEEE Institute of Electrical and Electronic Engineers",

address = "United States",

note = "12th International Symposium on Electrets, ISE-12 ; Conference date: 11-09-2005 Through 14-09-2005",

}

Savijärvi, A-M, Paajanen, M , Saarimäki, E & Minkkinen, H 2005, Novel heat durable electromechanical films: Cellular film making from polymers. in 12th International Symposium on Electrets, ISE '12. IEEE Institute of Electrical and Electronic Engineers, pp. 75-78, 12th International Symposium on Electrets, ISE-12, Salvador, Brazil, 11/09/05. https://doi.org/10.1109/ISE.2005.1612322

Novel heat durable electromechanical films: Cellular film making from polymers. / Savijärvi, Ann-Mari; Paajanen, Mika ; Saarimäki, Eetta et al.
12th International Symposium on Electrets, ISE '12. IEEE Institute of Electrical and Electronic Engineers, 2005. p. 75-78.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Novel heat durable electromechanical films

T2 - 12th International Symposium on Electrets, ISE-12

AU - Savijärvi, Ann-Mari

AU - Paajanen, Mika

AU - Saarimäki, Eetta

AU - Minkkinen, Hannu

PY - 2005

Y1 - 2005

N2 - A cellular electromechanical film has been developed from both, cyclo-olefin polymer (COP) and cyclo-olefin copolymer (COC). Cyclic olefins are thermally more durable than polypropylene (PP), which is the basis for the existing electromechanical film. This paper concentrates on studying cellular film making of the electromechanical film from cyclo-olefin compounds and a mineral filler. Due to the stiffness of the COP and COC as well as challenging film processing, the high temperature grade of cyclo-olefins were blended with a lower temperature polymer in different ratios in order to increase the film for inability in solid state processing. The effect of a blended polymer and its ratio in the manufactured compounds was studied from the cast films by a dynamical mechanical thermal analysis (DMTA). The blends were extruded in to a form of a cast film and drawn biaxially using a laboratory scale stretcher or sequentially on a small pilot line in MD and consequently using an Instron extensometer in TD. One COP based blend manufactured was drawn in TD on a small pilot line stenter to demonstrate film making on a film line similar to commercial film making units. Voided structure of the biaxially drawn films was improved by a gas diffusion expansion treatment and evaluated from scanning electron microscope (SEM) micrographs. Film samples were electrostatically charged and metallized and consequently, the level of the electromechanical sensitivity was measured from these blend based films by a dynamical method. It was shown that a cellular electromechanical film with an electromechanical coefficient around 10-15 pC/N durable at high temperatures of around 80-110°C, can be manufactured from the COP and the COC based blends.

AB - A cellular electromechanical film has been developed from both, cyclo-olefin polymer (COP) and cyclo-olefin copolymer (COC). Cyclic olefins are thermally more durable than polypropylene (PP), which is the basis for the existing electromechanical film. This paper concentrates on studying cellular film making of the electromechanical film from cyclo-olefin compounds and a mineral filler. Due to the stiffness of the COP and COC as well as challenging film processing, the high temperature grade of cyclo-olefins were blended with a lower temperature polymer in different ratios in order to increase the film for inability in solid state processing. The effect of a blended polymer and its ratio in the manufactured compounds was studied from the cast films by a dynamical mechanical thermal analysis (DMTA). The blends were extruded in to a form of a cast film and drawn biaxially using a laboratory scale stretcher or sequentially on a small pilot line in MD and consequently using an Instron extensometer in TD. One COP based blend manufactured was drawn in TD on a small pilot line stenter to demonstrate film making on a film line similar to commercial film making units. Voided structure of the biaxially drawn films was improved by a gas diffusion expansion treatment and evaluated from scanning electron microscope (SEM) micrographs. Film samples were electrostatically charged and metallized and consequently, the level of the electromechanical sensitivity was measured from these blend based films by a dynamical method. It was shown that a cellular electromechanical film with an electromechanical coefficient around 10-15 pC/N durable at high temperatures of around 80-110°C, can be manufactured from the COP and the COC based blends.

U2 - 10.1109/ISE.2005.1612322

DO - 10.1109/ISE.2005.1612322

M3 - Conference article in proceedings

SN - 978-0-7803-9116-1

SP - 75

EP - 78

BT - 12th International Symposium on Electrets, ISE '12

PB - IEEE Institute of Electrical and Electronic Engineers

Y2 - 11 September 2005 through 14 September 2005

ER -

Novel heat durable electromechanical films: Cellular film making from polymers

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