New monomers for the synthesis of heat-stable polyheterocycles
作者:V. P. Evstaf'ev、G. I. Braz、A. Ya. Yakubovich
DOI:10.1007/bf00470517
日期:1970.6
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作者:GUSTEN H.、 RINKE M.
DOI:——
日期:——
PBO FIBERS WITH IMPROVED MECHANICAL PROPERTIES WHEN EXPOSED TO HIGH TEMPERATURES AND HIGH RELATIVE HUMIDITY
申请人:Battelle Memorial Institute
公开号:EP2836637A2
公开(公告)日:2015-02-18
PBO Fibers with Improved Mechanical Properties when Exposed to High Temperatures and High Relative Humidity
申请人:Battelle Memorial Institute
公开号:US20150067940A1
公开(公告)日:2015-03-12
A method of treating fibers to improve resistance to high temperatures and relative humidity includes providing poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers, exposing the PBO fibers to an atmosphere of supercritical CO
2
saturated with an epoxy silane, i.e. 3-glycidoxypropyl methyldimethoxysilane. The PBO fibers are subjected to a first pressurizing and heating stage at a first temperature (50° C.) for a first period of time. The PBO fibers are then subjected to a second pressurizing and heating stage including increasing the temperature to a second temperature (110° C.) and holding at the second temperature for an additional period of time. The PBO fibers include 2-5 wt % of 3-glycidoxypropyl methyldimethoxysilane after diffusing the CO
2
out of the PBO fibers. The fibers are particularly useful in making lightweight body armor system components.
COMPOUND, LIGHT EMITTER, AND ORGANIC LIGHT EMITTING DEVICE
申请人:KYUSHU UNIVERSITY NATIONAL UNIVERSITY CORPORATION
公开号:US20160005978A1
公开(公告)日:2016-01-07
A compound represented by D-A-D is useful as a light emitter for an organic electroluminescent device: