聚苯乙烯

The effect of molecular weight, ethylene group and mixing of polyketone on the photodegradability were investigated. The mechanism of the photodegradation of ESTCO, STCO, STCO-PS and ESTCO-PS were reviewed. In addition, the block polymerization of methyl methacrylate initiated by STCO under UV irradiations was also studied.

研究了乙基取代基、分子量及共混物对聚酮光降解性能的影响，探索了STCO、ESTCO及其分别与聚苯乙烯共混物STCO-PS、ESTCO-PS的光降解行为和光降解机理，初步探讨了聚酮ESTCO光降解所产生的大分子自由基引发的甲基丙烯酸甲酯的聚合。

Lxxxiii, although assigned by Briggs ("Psalms", New York, 1906, p. lxvii) to the early Persian period, seems to have been written at the time of the havoc wrought by the Assyrian invasion of Tiglath-pileser III in 737 BC Ps.

LXXXIII号，尽管分配的布里格斯（&诗篇&，纽约， 1906年，第lxvii ）早日波斯时期，似乎已经被写入时所造成的严重破坏亚述入侵Tiglath - pileser三在公元前737聚苯乙烯。

This was also the reason for the recent closure of the 80,000 metric tons per year polystyrene plant in Ludwigshafen and the sale of our 320,000 metric tons per year styrene monomer site in Korea that we announced at the beginning of August, explained Joachim Streu, head of BASF's styrenics business.

这也是为每年8万吨聚苯乙烯最近关闭工厂的原因在路德维希港和我国每年320，000苯乙烯单体在韩国的网站，我们在8月初宣布吨出售，解释说：约阿希姆施特罗伊，头部巴斯夫苯乙烯业务。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。