大肉大捧一进一出视频来了,肉嫁高柳1~4动漫在线观看,四虎影院176,波多野42部无码喷潮

造價(jià)通
更新時(shí)間:2025.05.17
熱水管材用乙烯-丙烯無(wú)規(guī)共聚樹(shù)脂的結(jié)構(gòu)表征

格式:pdf

大小:454KB

頁(yè)數(shù): 3頁(yè)

Two commercial ethylene-propylene random copolymers(A and B) for hot water piping of which A has better long term heat stability and slow crack growth resistance performance than B were fractionated with respect to the isotactity distribution by preparative temperature-rising elution fractionation(TREF).The molecular weight and distribution of fractions and the original resins were investigated by gel permeation chromatography.The results indicated that both A and B had broad isotacticity distribution and A had fewer portions of high isotacticity than B.At the same time A had broader and more typical double-peak molecular weight distribution.The fractions of A had higher molecular weight and broader molecular weight distribution than those of B's.All of these results implied the differences between the catalysts or the polymerization processes for the two copolymers.

PP-R冷熱水管材技術(shù)通過(guò)鑒定

格式:pdf

大小:91KB

頁(yè)數(shù): 1頁(yè)

由青島化工學(xué)院塑料工程技術(shù)研究院研究的PP-R冷熱水管材及生產(chǎn)設(shè)備技術(shù)日前通過(guò)山東省科委組織的技術(shù)鑒定。 PP-R管是當(dāng)今世界最先進(jìn)的供水、供暖管材。

熱門(mén)知識(shí)

熱水管材(2.0MPa)

精華知識(shí)

熱水管材(2.0MPa)

最新知識(shí)

熱水管材(2.0MPa)
點(diǎn)擊加載更多>>

相關(guān)問(wèn)答

熱水管材(2.0MPa)
點(diǎn)擊加載更多>>
專(zhuān)題概述
熱水管材(2.0MPa)相關(guān)專(zhuān)題

分類(lèi)檢索:

主站蜘蛛池模板: 二连浩特市| 梁河县| 高雄县| 广州市| 阿克陶县| 会理县| 通河县| 惠东县| 永宁县| 台中县| 禄丰县| 镇原县| 大厂| 惠水县| 凤山县| 惠安县| 海门市| 肃宁县| 罗城| 宝兴县| 花垣县| 遂川县| 北票市| 大荔县| 绥宁县| 柳林县| 陕西省| 贵溪市| 赞皇县| 星子县| 东乌| 大竹县| 锡林郭勒盟| 民勤县| 大余县| 通道| 沭阳县| 班戈县| 宝应县| 古浪县| 游戏|