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標題: 酚醛環(huán)氧樹脂的性能,比較酚醛樹脂和環(huán)氧樹脂有什么不同 [打印本頁]
作者: linky169chem 時間: 2010-4-23 16:10
標題: 酚醛環(huán)氧樹脂的性能,比較酚醛樹脂和環(huán)氧樹脂有什么不同
酚醛樹脂熱穩(wěn)定性較好,但固化時需加熱,加壓,反應有副產(chǎn)物水,因此存在著氣泡殘留,有固化體積收縮大的弊病,且耐堿較性差.
一般雙酚A型環(huán)氧樹脂可以在常壓室溫下固化,體積收縮小,耐酸耐堿,但熱穩(wěn)定性差.
以線形酚醛為聚合物骨架進行環(huán)氧化生成的酚醛環(huán)氧樹脂兼?zhèn)浞尤?樹脂的高熱穩(wěn)定性及環(huán)氧樹脂的主反應性.
作者: bluecat888 時間: 2011-9-1 15:03
標題: 5 Common Issues Related to Our Gaming Experience(二)
If we don"t seem to meet the game"s technical requirements, we"d better look for another MMORPG, instead of trying to run it even when we know that it won"t work.
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The game installation might turn into a disaster, if we don"t meet the requirements for playing it. However, it"s a fact that many of us usually download a certain game and don"t even check if our computers will be able to handle it or not. Obviously, skipping this, will lead us to ask for help in a technical forum. And, after we can"t seem to get a satisfying answer, we will get frustrated for sure. Naturally, it will be better that before we try to play any game, we must check if we will be able to properly run it.
2. A Rude Community
A Virtual Community is an important feature which also leads us to play MMORPGs . As for, in many cases we will need help from other players to complete a quest, get into a dungeon, join a guild or even buy special items, etc. However, the existence of a rude community is pretty common among all the popular online games. Consequently, we shouldn"t be surprised if we ask something simple in the game chat, and all we get are flames or insults at the same time. Obviously, this is part of being a gamer, since if we love a MMORPG, we won"t really care much about how good or bad its community is. This feature has importance for some of us at choosing what game we are going to play. In this way, a rude community might be considered as something terrible for those who are looking for a social gaming experience, but it"s mostly true that every MMORPG has its own immature, rude and gentle people, which means that we will eventually find every kind of people who we can be friends with.
Some people have fun at giving rude answers to Newcomers. Nevertheless, most of these them, are also new players who recently start out.
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