| 查看: 598 | 回复: 5 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
求助：请帮忙翻译摘要，谢谢！
|
|||
| 聚合物的应力松弛过程主要表现为高分子链段的运动和重排以及键角的改变。从高聚物分子链段运动理论来说，高聚物应力松弛实际上是其分子链段沿着外力的方向作运动以减小或消除应力的过程，分子链段运动快慢直接制约应力松弛速率的大小。在应力松弛试验过程中，初始加载时试样产生的形变主要包括两部分：键长键角变化的普通弹性形变和高分子链段运动变化的高弹形变。试样的初始形变主要为普通弹性形变，普通弹性形变的模量很高。在初始形变自发回弹的内应力的作用下，随着时间的延长，那些拉伸时间较长的链段，先后沿着力的方向逐渐由卷曲分子构象向伸展分子构象运动，发展成为高弹形变。由于高弹形变模量远低于普通弹性形变模量，使得试样内维持相同应变的内应力减小，发生了应力松弛。由于高弹形变逐渐取代了普通弹性形变，宏观上就观察到了应力随时间的增加而减小的现象，随着观察时间的延长，应力松弛发展到与恒定应变相平衡的应力值时，应力松弛将停止达到稳定。 |
回复此楼» 猜你喜欢
求调剂
已经有3人回复
-
一志愿北京化工大学，初试成绩350求调剂
已经有14人回复
-
复试调剂
已经有4人回复
-
323分（计算机视觉和大模型项目）能直接上手
已经有3人回复
-
311分 22408 求调剂
已经有3人回复
-
320分人工智能调剂
已经有7人回复
-
一志愿郑大0705求调剂
已经有4人回复
-
0703化学
已经有10人回复
-
301求调剂
已经有10人回复
-
306分材料与化工求调剂
已经有6人回复
lpszk
铁杆木虫 (著名写手)
- 应助: 9 (幼儿园)
- 贵宾: 0.217
- 金币: 8061.9
- 散金: 544
- 红花: 18
- 沙发: 1
- 帖子: 1162
- 在线: 193小时
- 虫号: 260989
- 注册: 2006-06-18
- 性别: GG
- 专业: 光学
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
qingfeng877680(金币-20,VIP+0):本版不支持广告！ 10-10 20:09
qingfeng877680(金币-20,VIP+0):本版不支持广告！ 10-10 20:09
|
删除！ [ Last edited by qingfeng877680 on 2009-10-10 at 20:09 ] |
4楼2009-09-13 20:18:26
lpszk
铁杆木虫 (著名写手)
- 应助: 9 (幼儿园)
- 贵宾: 0.217
- 金币: 8061.9
- 散金: 544
- 红花: 18
- 沙发: 1
- 帖子: 1162
- 在线: 193小时
- 虫号: 260989
- 注册: 2006-06-18
- 性别: GG
- 专业: 光学
★ ★ ★ ★
yusongpan(金币+1,VIP+0):没有翻译 9-12 09:03
qingfeng877680(金币-5,VIP+0):本版不支持此类应助！ 10-10 20:09
yusongpan(金币+1,VIP+0):没有翻译 9-12 09:03
qingfeng877680(金币-5,VIP+0):本版不支持此类应助！ 10-10 20:09
| 到这个网站去会帮助你翻译：http://essaystar.com/Register.html?f=443 |
2楼2009-09-11 09:54:00
3楼2009-09-12 09:07:53
★ ★ ★ ★ ★ ★
yusongpan(金币+1,VIP+0): 9-18 09:40
yusongpan(金币+5,VIP+0): 9-18 09:41
yusongpan(金币+1,VIP+0): 9-18 09:40
yusongpan(金币+5,VIP+0): 9-18 09:41
|
部分你的修改一下，摘要毕竟很重要 The stress relaxation process of polymer is mainly for polymer chains and rearrangement of movement and key Angle of change. From the theory of sport polymers for chain, polymer stress relaxation is actually the molecular chain along the direction of force to do exercise to decrease or eliminate stress process, molecular chain directly restricts movement speed for the size of the stress relaxation rate. In the stress relaxation process of test sample loading, when the initial deformation produced mainly includes two parts: the key of ordinary long horn changes that elastic deformation and polymer chain period of high elastic deformation motion changes. The initial deformation sample for ordinary elastic deformation, ordinary elastic deformation modulus is very high. In the initial deformation of spontaneous rebound, under the action of stress with the extension of time, the long chain tension, successively gradually from the direction of the effort to extend molecular conformation curly conformation movement, high elastic deformation become. Due to the high elastic deformation modulus far below normal elastic deformation modulus, maintain the same sample of stress, strain and stress relaxation happened. Due to the high elastic deformation gradually replaced the ordinary elastic deformation, stress on the macro was observed with time and reduce the phenomenon, as observed the extension of time, the stress relaxation development should be balanced with the constant disguised stress value of the stress relaxation will stop, achieve stability. |
5楼2009-09-14 08:08:37
