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9集 《赛吾里麦》演唱讲解，音乐表现一定要自然流畅
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
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
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！
高考前必听的5首励志歌曲，《Dream it possible》最能鼓舞人心！
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。
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
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
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
