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,,]
雅思考试考场流程图 
2011第一季度雅思阅读回顾与解析 
雅思vs托福 阅读异同大盘点对照表 
中学生雅思阅读快速提高的秘密 
澳洲留学热门专业：土木工程专业排名 
雅思听力周周练第四期-参赛篇 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
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。
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
高考阅卷名师给考生的高考作文密训课 第5集 高考作文审题实操方法精讲（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？
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
他高考作文仅得6分，总分428分，被985高校录取，却被导师拒绝！
