应《网络安全法》要求，自2017年10月1日起，未进行实名认证将不得使用互联网跟帖服务。为保障您的帐号能够正常使用，请尽快对帐号进行手机号验证，感谢您的理解与支持！

24小时热门版块排行榜    

小木虫论坛-学术科研互动平台» 学术交流区» 论文翻译 » 论文翻译求助完结子版 » 求高人指点改改中文，翻译成英文
31/1返回列表
查看: 1271  |  回复: 2
只看楼主 @他人 存档 新回复提醒 (忽略) 收藏    在APP中查看

andong668

禁虫 (正式写手)
本帖内容被屏蔽

» 猜你喜欢
1楼 2013-04-12 17:36:52
已阅   关注TA 给TA发消息 送TA红花 TA的回帖

yimin58

木虫 (小有名气)

ttxd

【答案】应助回帖

With the rapid development of LED lighting technology, the LED flexible light band, as a kind of energy-saving and environment-protecting high efficiency lighting products, has been widely used in home lighting, commercial lighting and urban landscape, and other fields. However, as a new type of lighting products, it puts forward high requirements for the packaging materials due to the particularity of its application fields, i.e. good mechanics performance, flexural toughness, weatherability, transparency and fire retardancy, etc. Polyurethane, which has strong adhesion, good performance at high and low temperature and good mechanical properties, is the ideal choice for LED flexible light outdoor encapsulation, but it still has the problem of poor weather resistance and flame retardancy. This paper describes the synthesis of halogen-free and flame retardant bi-component polyurethane for LED, and its properties have been characterized. The main research contents and conclusions were as follows: (1) the transparent two-component polyurethane was synthesized with the semi prepolymer method, and the synthesis process and performance of the polyurethane were studied. The polyurethane prepolymer was synthesized with 4, 4 '- dicyclohexyl methane diisocyanate (H12MDI), polyether polyols (N210) and Polycaprolactone polyol (PCL210) as the raw materials, and its viscosity was determined. The results show that isocyanate index R of the prepolymer is 4, and the viscosity of the prepolymer is 3908 mPa•s after 1 h  reaction at 50 ℃ and then 2 h reaction at 80 ℃, which is suitable for the synthesis of two-component polyurethane. The effects of catalyst types, curing temperature, curing time and polyols kinds/ratio on the mechanical and optical properties of the polyurethane in the curing process were investigated. The results show that the polyurethane has good mechanical, optical and hydrolysis-resistance performances with a catalyst (TK233), N210 and N3050, etc. as the raw materials, and after 3 days of room temperature curing. (2) The composite flame retardant containing silicon, phosphorus and nitrogen was synthesized by using the method of hydrolytic condensation , and its performance was characterized. The composite flame retardant was synthesized with gamma-aminopropyl triethoxy silane (KH550), N- (β aminoethyl) - γ - aminopropyl triethoxysilane (KH792) and phosphoric acid as the raw materias, and its performance was characterized. The results show that the flame retardant can effectively combine the three elements of silicon, phosphorus and nitrogen together, and has higher thermogravimetric residues and micron size after combustion. (3) The two-component flame retardant polyurethane was synthesized with the semi prepolymer method, and its its performance was characterized. The flame retardant, pentaerythritol, magnesium stearate, stearic acid, talcum powder and other additives were mixed and added to polyurethane, and its flame retardant  performance was examined. The results show that the flame retardant performance is the best when the ratio of the amount of ammonium phosphate to that of pentaerythritol in the flame retardant is 3 : 1, and the amount of Si is 3, 4 and 2 times of magnesium stearate, stearic acid and talcum powder, respectively, and the mechanism was studied.
赞一下 回复此楼
2楼2013-04-12 19:55:31
已阅   关注TA 给TA发消息 送TA红花 TA的回帖

yimin58

木虫 (小有名气)

ttxd
★ ★ ★ ★ ★
andong668: 金币+5, 翻译EPI+1, 你的翻译和有道翻译的差不多啊 2013-04-12 20:09:00
sltmac: 翻译EPI-1, 机器翻译，EPI撤销 2013-05-26 10:07:07
sltmac: 违规存档 2013-05-26 10:07:12
小修改
but it still has the problems of poor weather resistance and flame retardancy (problems)
This paper describes the synthesis of halogen-free and flame-retardant （flame-retardant）
赞一下 回复此楼
3楼2013-04-12 20:04:03
已阅   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 andong668 的主题更新
31/1返回列表
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 288求调剂，一志愿华南理工大学071005 +4 ioodiiij 2026-03-17 4/200 2026-03-18 12:36 by Linda Hu
[考研] 一志愿中国海洋大学，生物学，301分，求调剂 +3 1孙悟空 2026-03-17 3/150 2026-03-18 10:28 by macy2011
[考研] 268求调剂 +6 简单点0 2026-03-17 6/300 2026-03-18 09:04 by 无际的草原
[考研] 考研化学学硕调剂，一志愿985 +4 张vvvv 2026-03-15 6/300 2026-03-17 17:15 by ruiyingmiao
[考研] 275求调剂 +4 太阳花天天开心 2026-03-16 4/200 2026-03-17 10:53 by 功夫疯狂
[考研] 考研调剂 +3 淇ya_~ 2026-03-17 5/250 2026-03-17 09:25 by Winj1e
[考研] 321求调剂 +5 大米饭！ 2026-03-15 5/250 2026-03-16 16:33 by houyaoxu
[考研] 070303一志愿西北大学学硕310找调剂 +5 d如愿上岸 2026-03-12 8/400 2026-03-16 15:19 by peike
[考研] 一志愿华中师范071000，325求调剂 +6 RuitingC 2026-03-12 6/300 2026-03-16 14:50 by 可淡不可忘
[考研] 294求调剂 +3 Zys010410@ 2026-03-13 4/200 2026-03-15 10:59 by zhq0425
[考研] 308 085701 四六级已过求调剂 +7 温乔乔乔乔 2026-03-12 14/700 2026-03-14 10:49 by JourneyLucky
[考研] 304求调剂 +6 Mochaaaa 2026-03-12 7/350 2026-03-13 22:18 by 星空星月
[考研] ［0860］321分求调剂，ab区皆可 +4 宝贵热 2026-03-13 4/200 2026-03-13 22:01 by 星空星月
[考研] （081700）化学工程与技术-298分求调剂 +12 11啦啦啦 2026-03-11 35/1750 2026-03-13 21:25 by JourneyLucky
[考研] 求调剂 +5 一定有学上- 2026-03-12 5/250 2026-03-13 18:31 by ms629
[考研] 307求调剂 +5 超级伊昂大王 2026-03-12 5/250 2026-03-13 15:56 by 棒棒球手
[考研] 工科278分求调剂 +5 周慢热啊 2026-03-12 7/350 2026-03-13 15:49 by JourneyLucky
[考研] 295求调剂 +3 小匕仔汁 2026-03-12 3/150 2026-03-13 15:17 by vgtyfty
[论文投稿] 投稿问题 5+4 星光灿烂xt 2026-03-12 6/300 2026-03-13 14:17 by god_tian
[考研] 290求调剂 +3 ADT 2026-03-13 3/150 2026-03-13 10:19 by peike
信息提示
关闭
请填处理意见
关闭