来自：查字典高考网 2014-12-25
polymer gels一种聚合凝胶
The following information was part of our display for the SET96 and SET98 Scientific Power to the People Exhibition, TheGalleries, Bristol, 20th and 21st March 1998.
A POLYMER is a very long molecule rather like a very long piece of string.
The borax joins two molecules together to make a large network - rather like a flexible scaffolding. This is cross-linking.
This turns the fluid dissolved polymer into a GEL.
In oilwells water is pushed down to push oil up. If this breaks through to the production well bore, the well will just produce water. A solution is to block the rock pores with polymer gel to make the well produce oil again. These gels can be made from naturally occurring sugar-based polymers such as Guar and they can be cross-linked with Cobalt or Chromium.
Other everyday examples of polymer gels are to be found in non-drip emulsion paints, foods, car tyres and agrochemicals.
The polymer that we are using is POLYVINYL ALCOHOL and we are joining the strands together with BORAX. This gel, when coloured, is sold in toyshops as SLIME.
【阅读辅导：托福考试阅读背景知识(四十五)】相关文章：
[标签：海外留学,语言考试,托福,,]
沈阳音乐学院郎亦农教授的女高音高考曲目解析课程 第1集 沈阳音乐学院郎亦农为你讲解女高音高考曲目
高考体育四项生的日常训练——深蹲移动跳：发展膝关节，踝关节力量。
爆笑班主任 第一季 第220集 高考前最后一只视频，山东王老师揭秘高考的秘密
高中语文知识清单高考语文总複习工具书第5次修订五全綵版五三曲一线科学备考基础知识手册知识大集结资料书参考书导书高一高二高三
乾坤已定，组合解读2019高考数学全国3卷理科18题，你是黑马吗？
广州早晨 2019 山西一高中班主任带学生骑行1800公里去上海
爆笑班主任 第一季 第221集 高考结束学生有多疯狂？山东王老师疯狂吐槽
你高考成绩高吗？这道题目怎能成立？高难度奥数，能不能把你难住
探秘历史 第二季 第233集 考英语用来睡觉，结果仍是高考状元，如今她怎么样了？
学渣儿子高考，英语选择题全选B！老师通报成绩的那一刻父亲懵了
张雪峰高考志愿填报指南 第28集 高考志愿分析，材料科学与工程专业，就业很一般，建议慎重选择
美术联考用纸上海考试模拟试卷纸高考统考纸 4k水粉纸素描纸 速写纸卡纸美术模拟测试试卷纸 美术考试专用纸
葛军大爷怒了：高考我出了个小学数学送分题，你们跟我说不会做？
