Topic
Polymethylpentene
About: Polymethylpentene is a research topic. Over the lifetime, 164 publications have been published within this topic receiving 1036 citations. The topic is also known as: Poly(4-methyl-1-pentene).
Papers published on a yearly basis
Papers
TL;DR: Intense terahertz electromagnetic pulses are applied to window and substrate materials commonly used in THz spectroscopy and induced optical birefringence is observed in all samples, except in quartz and Si, where, respectively, a linear electrooptic signal and a response beyond the perturbative regime are found.
Abstract: We apply intense terahertz (THz) electromagnetic pulses with field strengths exceeding 2 MV cm−1 at ~1 THz to window and substrate materials commonly used in THz spectroscopy and determine the induced optical birefringence. Materials studied are diamond, sapphire, magnesium oxide (MgO), polymethylpentene (TPX), low-density polyethylene (LDPE), silicon nitride membrane (SiN) and crystalline quartz. We observe a Kerr-effect-type transient birefringence in all samples, except in quartz and Si, where, respectively, a linear electrooptic signal and a response beyond the perturbative regime are found. We extract the nonlinear refractive indices and the electrooptic coefficient (in the case of quartz) of these materials and discuss implications for their use as windows or substrates in THz pump-optical probe spectroscopy.
101 citations
TL;DR: The properties of optical materials usable in the terahertz (THz) spectral range, which is the boundary between the optical and radio ranges, are examined in this paper, where physical, chemical and optical properties of conventional and new materials, including crystalline (silicon, sapphire, quartz, diamond, germanium, and silicon carbide), as well as a number of polymers (polymethylpentene, polyethylene, and polytetrafluoroethylene), are discussed and compared.
Abstract: The properties of optical materials usable in the terahertz (THz) spectral range, which is the boundary between the optical and radio ranges, are examined. The relevance of the research field associated with the optics of THz devices is largely governed by intensified activity on creating lasers operating in the THz range and the discovery of substantial problems in the use of optical materials for these applications in general. The present study is devoted to analyzing the properties—especially optical properties—of the THz materials used. The characteristics are given, and the physical, chemical, and optical properties of conventional and new materials, including crystalline (silicon, sapphire, quartz, diamond, germanium, and silicon carbide), as well as a number of polymers (polymethylpentene, polyethylene, and polytetrafluoroethylene), are discussed and compared.
95 citations
Patent•
22 Sep 1987
TL;DR: In this paper, a package is disclosed for natural products and comprises a first wall region of thermoplastic material and a second wall region which comprises a porous substrate hermetically sealed at its edges to the thermoplastics and covered with a gas-permeable layer of polymethylpentene.
Abstract: A package is disclosed for natural products and comprises a first wall region of thermoplastic material and a second wall region which comprises a porous substrate hermetically sealed at its edges to the thermoplastic material and covered with a gas-permeable layer of polymethylpentene (14). The area of the porous substrate and its outer covering of polymethylpentene is selected in relation to the total area of the package and in dependence upon the natural products to permit a desired atmosphere to be maintained within the package as a result of respiration of the natural products and gas transfer through the porous substrate.
58 citations
Patent•
3 Jan 1995TL;DR: Polymethylpentene (PMP) compositions provide resin substrates for high performance devices with a material which has a low dielectric constant and a low dissipation factor as mentioned in this paper.
Abstract: High performance semiconductor devices, such as those used to package microprocessor integrated circuits, demand materials with excellent electrical, physical and chemical properties. Polymethylpentene (PMP) compositions provide resin substrates for high performance devices with a material which has a low dielectric constant and a low dissipation factor. In addition, PMP has very low moisture absorption, and good mechanical stability under repeated thermal stress, which will help keep the device from cracking and warping during high temperature assembly processes and constant use.
51 citations
Patent•
27 Dec 1989
TL;DR: A release film composed of a laminate comprising: (a) an interlayer comprising at least one layer of flexible polyolefin, and (b) two outer layers (1, 1′) of crystalline polymethylpentene, one on each side of the interlayer as discussed by the authors.
Abstract: A release film composed of a laminate comprising: (a) an interlayer (2) comprising at least one layer of a flexible polyolefin, and (b) two outer layers (1,1′) of crystalline polymethylpentene, one on each side of the interlayer (2).
37 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 4 |
| 2019 | 7 |
| 2018 | 4 |
| 2017 | 6 |
| 2016 | 6 |