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,,]
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
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
高考阅卷名师给考生的高考作文密训课 第3集 高考作文审题实操方法精讲（一）
探秘历史 第二季 第479集 河南叛逆高考生，写下8000字批判作文，现状如何？
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
高考前必听的5首励志歌曲，《Dream it possible》最能鼓舞人心！
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
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。
1000张学生用草稿纸考研专用免邮空白便宜薄演草演算纸白纸本书写纸批发打草a4大张实惠装18k高考数学草稿本
NBA流言收割机 第6集 神预测？高考数学试题暗示猛龙勇士4
衍声高考琴行2019高本硕学生暑假音乐会 张俊瀚《陕北民歌主题变奏曲》《阿根廷舞曲》第三乐章
视频|2019全国高考今日开考: 语文特级教师评析上海卷高考作文
2019全国高考志愿填报攻略 第50集 天津市高考历史三年本科录取排名
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
