Results 1 to 10 of about 9,507 (99)
Zhejiang Daxue xuebao. Lixue ban, 2013 以三（3，5-二叔丁基水杨醛缩苯乙胺）镧La (OPEBS)3为引发剂引发L-丙交酯(L-LA)和ε-己内酯(ε-CL)的共聚，可控合成嵌段共聚物.研究了单体加料顺序、投料比、单体与引发剂的摩尔比(M/I)及聚合温度对L-LA和ε-CL共聚的影响.由石油醚抽提纯化的聚合物经GPC、1H NMR和DSC分析，表明该共聚物为L-LA和ε-CL嵌段共聚物.
BIEZhen-ying(别振英) +3 more
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Gongye shui chuli, 2011 介绍了近年来国内外对三元复合驱阻垢剂的研究与应用,着重介绍丙烯酸类共聚物、马来酸类共聚物、磺酸类共聚物、含膦共聚物以及新型的环境友好型共聚物阻垢剂的研究、合成与应用情况,提出了现有阻垢剂的改进方向,并指出环境友好型共聚物将是阻垢剂未来的研究重点。
陈健斌 +3 more
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Gongye shui chuli, 1995 对丙烯酸/2-丙烯酰氧基乙磺酸钠共聚物的合成进行了研究?探讨了溶液中钙离子浓度?pH值?共聚物用量与共聚物阻垢效果的关系及共聚物与其它阻垢剂的协同效应?研究结果表明.该共聚物有较好的阻垢效果,并与ATMP?EDTMP?HEDP有较好的协同效应?用扫描电子显微镜观察表明该共聚物导致碳酸钙晶体发生畸变?
林保平, 李俊文, 龙荷云
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Microphase separation of mixtures of two diblock copolymers(两嵌段共聚物共混体系的相分离研究)
Zhejiang Daxue xuebao. Lixue ban, 2009 用耗散粒子动力学方法(DPD)研究了由两种不同成分组成的两嵌段共聚物组成的混合体系在纳米尺度下的自组装行为.两种嵌段共聚物的聚合度相同,在稳定状态下,纯嵌段共聚物1呈层状有序结构,纯嵌段共聚物2呈无序或六角柱状结构.DPD研究表明,在两者混合体系中,随着嵌段共聚物2体积分数的增加,嵌段共聚物1只出现了层状的有序相,而嵌段共聚物2则呈现出从球状相到柱状相再到层状有序相的有趣变化,随着嵌段共聚物2对称性的增强,其形成的有序相所占的体积分数区域越小.同时,通过混合体系单体密度分布曲线和末端距分布情况 ...
LUOJin(罗进), HELin-li(何林李)
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Gongye shui chuli, 1987 以过氧化物为引发剂,合成了顺丁烯二酐、丙烯酸与丙烯酸甲酯共聚物。研究了单体克分子比、反应温度、反应时间、引发剂用量等对共聚物阻垢效果的影响,以及溶液中钙离子浓度、溶液温度、pH值等因素与共聚物阻垢效果的关系。与一些阻垢剂比较表明,该共聚物有较好的阻垢效果。用X衍射和电子探针等分析方法研究了共聚物导致无机盐晶体发生畸变,共聚物的吸附、增溶分散和螯合作用的阻垢机理。
郑邦乾, 朱清泉
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Psychometric framework for coexistence with large carnivores
Conservation Biology, EarlyView.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source
Gongye shui chuli, 1994 马-丙共聚物是常用的碳酸钙阻垢剂。国内外均使用以甲苯等为溶剂、以马来酸酐及丙烯酸为原料共聚制得马-丙共聚物。本文对以水为溶剂、马来酸酐和丙烯酸为原料制得的马-丙共聚物的阻垢性能进行了系统的研究，实验数据表明以水为溶剂合成的马-丙共聚物的阻垢性能完全可以达到市售以甲苯为溶剂制备的马-丙共聚物的阻垢性能。
郑承超, 李海风
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT In Co‐based alloys, the γ phase is normally stable at high temperatures and the ε phase at low temperatures, and there is a martensitic transition on cooling to ∼417°C. In the γ/β dual‐phase CoCrAlY bond coat of turbine blade thermal barrier coating systems, we observed the opposite: γ remained stable at room temperature, yet it underwent a γ →
Junkai Liu +8 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Micro‐/nanoscale single‐crystal materials have garnered significant attention due to their unique size‐dependent mechanical and functional properties, with applications spanning diverse cutting‐edge fields. This review provides a state‐of‐the‐art overview of these materials, encompassing their synthesis methods, advanced mechanical and ...
Yi Li +16 more
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Functional Ecology, Volume 40, Issue 8, Page 2590-2601, August 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Permafrost thaw is reshaping nutrient dynamics in boreal forests, but its impacts on tree nutrient limitation and functional strategies remain poorly understood. Clarifying these responses is crucial for predicting the response of boreal forests to climate change.
Qiyue Fu +9 more
wiley +1 more source