关于本周一（明天）《高聚物凝聚态结构与性能》停课通知
因故本周一（明天）《高聚物凝聚态结构与性能》停课，补课时间由任课老师课堂另行通知。请相互转告，谢谢！<p class="MsoNormal" style="line-height:200%;layout-grid-mode:char;mso-layout-grid-align:none;text-autospace:none">《高分子凝聚态结构与性能》作业。请阅读以下一段话，分析纳米粒子填充高分子黏度降低的原因。撰写500字以内的报告。<p class="MsoNormal" style="line-height:200%;layout-grid-mode:char;mso-layout-grid-align:none;text-autospace:none"> <p class="MsoNormal" style="line-height:200%;layout-grid-mode:char;mso-layout-grid-align:none;text-autospace:none">VISCOSITY REDUCTION OF NANOPARTICLE FILLED POLYMERS It is a common observation that particle addition produces an increase in viscosity in many systems having particle sizes much larger than molecular size of suspending fluids. Nanoparticles well dispersed in polymer melts have also been shown to anomalously decrease bulk viscosity of entangled polymer, which contradicts to the well-known Einstein theory but is understandable in systems with repulsive particle-polymer interactions <spanlang=EN-US style='font-size:12.0pt;line-height:200%;color:#0000CC;mso-no-proof:yes'><spanstyle='mso-spacerun:yes'> ADDIN EN.CITE<EndNote><Cite><Author>Smith</Author><Year>2002</Year><RecNum>580</RecNum><DisplayText>[1]</DisplayText><record><rec-number>580</rec-number><foreign-keys><keyapp="EN" db-id="vx5serx9m5dxeaetztzxwte42x29pf2rfvxs">580</key></foreign-keys><ref-typename="JournalArticle">17</ref-type><contributors><authors><author>Smith,G. D.</author><author>Bedrov, D.</author><author>Li,L.</author><author>Byutner,O.</author></authors></contributors><titles><title>Amolecular dynamics simulation study of the viscoelastic properties of polymernanocomposites</title><secondary-title>The Journal of ChemicalPhysics</secondary-title></titles><periodical><full-title>TheJournal of Chemical Physics</full-title><abbr-1>J Chem Phys</abbr-1><abbr-2>J.Chem.Phys.</abbr-2></periodical><pages>9478-9489</pages><volume>117</volume><number>20</number><keywords><keyword>polymers</keyword><keyword>viscoelasticity</keyword><keyword>moleculardynamics method</keyword><keyword>shear modulus</keyword><keyword>viscosity</keyword><keyword>nanostructuredmaterials</keyword></keywords><dates><year>2002</year></dates><urls><related-urls><url>http://scitation.aip.org/content/aip/journal/jcp/117/20/10.1063/1.1516589</url></related-urls></urls><electronic-resource-num>doi:http://dx.doi.org/10.1063/1.1516589</electronic-resource-num></record></Cite></EndNote><spanstyle='mso-element:field-separator'>[<span style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-no-proof:yes;text-decoration:none;text-underline:none">1<span lang="EN-US" style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-no-proof:yes">]<spanlang=EN-US style='font-size:12.0pt;line-height:200%;color:#0000CC;mso-no-proof:yes'>.<span lang="EN-US" style="font-size:12.0pt;line-height:200%;color:red"> However, the aggregated nanoparticles do not contribute to the viscosity decrease<span lang="EN-US" style="font-size:12.0pt;line-height:200%;color:red"> <spanlang=EN-US style='font-size:12.0pt;line-height:200%;color:#0000CC;mso-font-kerning:0pt'><spanstyle='mso-spacerun:yes'> ADDIN EN.CITE<EndNote><Cite><Author>Nusser</Author><Year>2011</Year><RecNum>660</RecNum><DisplayText>[2]</DisplayText><record><rec-number>660</rec-number><foreign-keys><keyapp="EN"db-id="vx5serx9m5dxeaetztzxwte42x29pf2rfvxs">660</key></foreign-keys><ref-typename="JournalArticle">17</ref-type><contributors><authors><author>Nusser,Klaus</author><author>Schneider, GeraldJ.</author><author>Pyckhout-Hintzen,Wim</author><author>Richter,Dieter</author></authors></contributors><titles><title>ViscosityDecrease and Reinforcement in Polymer�SilsesquioxaneComposites</title><secondary-title>Macromolecules</secondary-title></titles><periodical><full-title>Macromolecules</full-title><abbr-1>Macromolecules</abbr-1><abbr-2>Macromolecules</abbr-2></periodical><pages>7820-7830</pages><volume>44</volume><number>19</number><dates><year>2011</year><pub-dates><date>2011/10/11</date></pub-dates></dates><publisher>AmericanChemical Society</publisher><isbn>0024-9297</isbn><urls><related-urls><url>http://dx.doi.org/10.1021/ma201585v</url></related-urls></urls><electronic-resource-num>10.1021/ma201585v</electronic-resource-num><access-date>2014/07/16</access-date></record></Cite></EndNote><spanstyle='mso-element:field-separator'>[<span style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-font-kerning:0pt;mso-no-proof:yes;text-decoration:none;text-underline:none">2<span lang="EN-US" style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-font-kerning:0pt;mso-no-proof:yes">]<spanlang=EN-US style='font-size:12.0pt;line-height:200%;color:#0000CC;mso-font-kerning:0pt'>.<span lang="EN-US" style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-font-kerning:0pt;mso-ansi-language:EN"> <span lang=ENstyle='font-size:12.0pt;line-height:200%;color:#0000CC;mso-ansi-language:EN'><spanstyle='mso-element:field-begin'><spanstyle='mso-spacerun:yes'> ADDIN EN.CITE <EndNote><Cite><Author>Mackay</Author><Year>2003</Year><RecNum>661</RecNum><DisplayText>[3]</DisplayText><record><rec-number>661</rec-number><foreign-keys><keyapp="EN" db-id="vx5serx9m5dxeaetztzxwte42x29pf2rfvxs">661</key></foreign-keys><ref-typename="Journal Article">17</ref-type><contributors><authors><author>Mackay,Michael E.</author><author>Dao, TienT.</author><author>Tuteja, Anish</author><author>Ho,Derek L.</author><author>Van Horn, Brooke</author><author>Kim,Ho-Cheol</author><author>Hawker, Craig J.</author></authors></contributors><titles><title>Nanoscaleeffects leading to non-Einstein-like decrease inviscosity</title><secondary-title>NatureMaterials</secondary-title></titles><periodical><full-title>NatureMaterials</full-title><abbr-1>Nat Mater</abbr-1><abbr-2>Nat.Mater.</abbr-2></periodical><pages>762-766</pages><volume>2</volume><number>11</number><dates><year>2003</year></dates><publisher>NaturePublishing Group</publisher><isbn>1476-1122</isbn><work-type>10.1038/nmat999</work-type><urls><related-urls><url>http://dx.doi.org/10.1038/nmat999</url></related-urls></urls></record></Cite></EndNote><spanstyle='mso-element:field-separator'>[<span lang="EN" style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-ansi-language:EN;mso-no-proof:yes;text-decoration:none;text-underline:none">3<span lang="EN" style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-ansi-language:EN;mso-no-proof:yes">]<spanlang=EN style='font-size:12.0pt;line-height:200%;color:#0000CC;mso-ansi-language:EN'><span lang="EN" style="font-size:12.0pt;line-height:200%;color:#0000CC;mso-ansi-language:EN"> found that nanoparticles of intramolecular crosslinking of single PS chains reduce the viscosity of high molecular weight linear PS when the interparticle gap is smaller than the linear polymer size and the viscosity reduction scales with the change in free volume. <spanlang=EN style='mso-ansi-language:EN'><spanstyle='mso-spacerun:yes'> ADDIN EN.REFLIST <span style='mso-element:field-separator'><span lang="EN" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;mso-ansi-language:EN;mso-no-proof:yes">[1] Smith GD, Bedrov D, Li L, Byutner O. J Chem Phys 2002;117:9478-9489.<span lang="EN" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;mso-ansi-language:EN;mso-no-proof:yes"><span lang="EN" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;mso-ansi-language:EN;mso-no-proof:yes">[2] Nusser K, Schneider GJ, Pyckhout-Hintzen W, Richter D. Macromolecules 2011;44:7820-7830.<span lang="EN" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;mso-ansi-language:EN;mso-no-proof:yes"><span lang="EN" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;mso-ansi-language:EN;mso-no-proof:yes">[3] Mackay ME, Dao TT, Tuteja A, Ho DL, Van Horn B, Kim H-C, Hawker CJ. Nat Mater 2003;2:762-766.<span lang="EN" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;mso-ansi-language:EN;mso-no-proof:yes"> <span lang=EN style='mso-ansi-language:EN'>
