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,,]
探秘历史 第二季 第211集 此人高考数学考了0分，因作文写3句话被重点大学录取
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？
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
amc传媒音乐影像 第一季 第600集 高中校长演唱《记忆花园》为高考学子助力打气
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
优秀！英语数学双满分，广西“最牛”高考状元730分刷新最高纪录
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
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？
张雪峰高考志愿填报指南 第15集 高考填报志愿，想学电子信息类专业，推荐报这六所高校，不出错
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？
amc传媒音乐影像 第一季 第598集 西安原创乐队走进英泰青卓 用音乐助力高考学子
