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Predecessor
Volume 80, Issue 8
Displaying 1-9 of 9 articles from this issue
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[in Japanese], [in Japanese], [in Japanese]2007 Volume 80 Issue 8 Pages 281
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (176K) -
Yozo NAGAI2007 Volume 80 Issue 8 Pages 282-287
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSProduction of Polyethylene (PE), which is the largest volume plastic now in the world, started about 70 years ago. This paper reviews the major technological progresses in these 20 years and states the future prospects of PE industry. Many developmental works on single-site catalysts and cascade reactor processes and so on have made the precise control of polymer structure possible and improved the properties of PE. And new technologies for co-polymerization with polar co-monomers and olefin block co-polymerization are now opening the new field of PE.View full abstractDownload PDF (6502K) -
Masaya YAMADA2007 Volume 80 Issue 8 Pages 288-291
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSThe growth rate of PP demand in Japan gradually becomes duller recently, though the demand has increased for the last 20 years. The PP manufacturers are concentrating on the development for the automotive and the industrial film applications now. The view of Japanese PP market in the future was described in this report according to the market segment.View full abstractDownload PDF (2219K) -
Ryo SAITO2007 Volume 80 Issue 8 Pages 292-296
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSPolystyrene includes GPPS (General purpose polystyrene) and HIPS (High impact polystyrene). The domestic market of polystyrene was about one million ton/year in 1990's, but since 2000, the domestic market has been decreasing due to the decrease of electric appliances application. Many electric appliances manufacturers transferred their factories overseas.
Polystyrene manufacturers were reorganized in decade. Ten polystyrene makers of 1993 were gathered to four companies by 2003.
The price of styrene has been soaring since the second half of 2004. Polystyrene is mature business. For general purposes, the number of grades of polystyrene has been decreasing and will continually decreasing in future.
It is not easy to develop new applications or new grades for polystyrene. But, in resent years, a few of new market or polystyrene grades have been developed in fields of optics, food packaging, flame retardation and other functional fields. PS Japan Corporation has various kinds of functional polystyrene grades; low volatile grade, heat resistant grade, transparent HIPS, and so on.
Recycling of polystyrene and safety of styrene oligomer are important.
Also in the future, it is essential to steadily develop new market and original materials of polystyrene.View full abstractDownload PDF (5543K) -
Isao Satoh2007 Volume 80 Issue 8 Pages 297-301
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSAt first my classification system of plastic materials was described. Then an explanation was made clearly on the definition of engineering plastics. Subsequently, the characteristics of 5 major engineering plastics were explained based on crystallinity. Moreover, the materials called super engineering plastics can be classified in 3 groups, i. e. popular super engineering plastics, transparent heat-resistant plastics and super heat-resistant plastics.
Also the engineering plastic industry for the past 20 years in Japan was reviewed. Finally my opinion was given on the future of engineering plastic industry in our country.View full abstractDownload PDF (2513K) -
Kiichi HASEGAWA2007 Volume 80 Issue 8 Pages 302-308
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSThe article describes the demand and technology trends of thermosetting resins in the last 20 years. In the thermosetting resin, the production of urea formaldehyde resin decreased roughly, because of the reducing tendency of formaldehyde which is the major cause of the sick-house syndrome. On the other hand, epoxy resin becomes a favorable increasing production accompanied as the increasing electronic component use for the personal computer. The remarkable technical developments progressed at the fields of phenol resin and epoxy resin. In the future, synthesis of designed thermosetting polymers becomes possible, and the new application will be widely developed.View full abstractDownload PDF (3115K) -
Yasushi SAKAI2007 Volume 80 Issue 8 Pages 309-314
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSPolyvinyl Chloride (PVC) is a commodity plastic resin which was produced commercially in 1935. Global PVC demand is forecast to increase from 30 million tons in 2004 to 50 million tons in 2020. However, in Japan, the demand of PVC is decreasing gradually from 1998 against the background of the economic slump and the environmental problem. In order to escape from this crisis, the company which produces PVC carried out reorganization and reduction of capacity itself. Moreover, the PVC industry has concentrated on development of recycling technology. In this paper, PVC demand trend, industry reorganization, manufacturing technique trend, environmental problem, and recycling technology are introduced.View full abstractDownload PDF (6829K) -
[in Japanese], [in Japanese], [in Japanese]2007 Volume 80 Issue 8 Pages 315-316
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (278K) -
3. Structural Control and Functionalization of Oligomeric Silsesquioxanes (Part 1)Yusuke KAWAKAMI2007 Volume 80 Issue 8 Pages 317-324
Published: August 15, 2007
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSOligomeric silsesquioxanes show excellent properties derived from their unique structure, and have been used as component to improve the property of various polymeric systems. Reaction conditions to obtain specific structure of the silsesquioxanes are discussed paying attention to the reaction mechanism. Some functionalization reactions were also illustrated.View full abstractDownload PDF (8589K)
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