改性聚苯乙烯涂料

研制了以废聚苯乙烯泡沫塑料为基料的GPS涂料,代替调合漆用于室内墙围装饰。本文介绍了GPS涂料的配方和生产工艺,并列举了涂料性能和差热-热重分析结果。

聚苯乙烯挤塑泡沫板外墙外保温施工技术

随着国家节能政策的贯彻及人们对室内热环境、舒适度要求的不断提高 ,外墙外保温系统在建筑节能中被广泛采用 ,做好墙体、地面等保温隔热在建筑工程中起着举足轻重的作用。介绍了挤塑板外墙外保温的材料和施工工艺、施工方法与质量控制等。指出采用外墙外保温施工技术达到了建筑节能的目的 ,降低了采暖费用 。

Kinetics and Mechanism of Bulk Polymerization of Styrene Catalyzed by Rare Earth Catalyst

The bulk polymerization of styrene catalyzed by Nd(P204)3/MgBu2/HMPA (hexamethyl phospho-ramide) was carried out in capped glass tubes. The effects of reaction conditions on polymerization conversion and molecular weight in the range of high conversion were investigated. The molecular weight of the resultant polymers is dramatically high and its distribution is relatively narrow. The polymerization process demonstrates the feature of living polymerization and auto-acceleration phenomenon. The auto-acceleration phenomenon is attributed to the non-instantaneous formation of the active species. The experimental data suggest that chain transfer to MgBu2 is one of the factors governing the molecular weight development. A mechanism of polymerization is presented with the chain transfer process incorporated.

中高应变率下EPS泡沫的冲击压缩实验

用SHPB装置对三种密度的发泡聚苯乙烯(Expanded Polystyrene,EPS)材料进行了从300/s至1400/s共五个中高应变率下的冲击压缩实验。实验中采用波分离技术有效延长应力-应变曲线的测量范围,并简要介绍了其原理和具体实施办法。所有应变率下均获得了含有弹性段、平台屈服段和压实段完整三阶段的应力-应变曲线。曲线的重复性较好,应变率基本恒定。实验结果表明,相同密度EPS泡沫应力-应变曲线的屈服平台段长度随应变率的增加而增加,且趋于平缓。在相近应变率下,随EPS泡沫的密度增加,屈服应力增加,而变形及吸能能力减弱。