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DTSTART;TZID=America/Los_Angeles:20260819T090000
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UID:22890-1787130000-1787133600@www.siliconvalleyacs.org
SUMMARY:ORCID 101: The ORCID iD and Record
DESCRIPTION:Sponsored by ORCID US Community\n9:00 am-10:00 am Online\, Free\, Registration required\n\nGetting and using your free ORCID iD and ORCID record can help you save time and get credit for your work in funding\, publishing\, and research reporting workflows. Funding organizations\, publishers\, and research institutions are increasingly requiring or asking for ORCID iDs from researchers\, so this workshop will help you make sure you are ahead of the game. In this workshop\, we will cover: – An overview of the benefits of ORCID for researchers – How ORCID can help you save time throughout the research landscape – Tips and tricks for keeping your ORCID record up-to-date No prior experience with ORCID necessary. The session recording will be sent to all who register. See you there! \n 
URL:https://www.siliconvalleyacs.org/event/orcid-101-the-orcid-id-and-record-2/
LOCATION:Virtual
CATEGORIES:Webinar
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DTSTART;TZID=America/Los_Angeles:20260819T180000
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CREATED:20260809T182127Z
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UID:22895-1787162400-1787166000@www.siliconvalleyacs.org
SUMMARY:How Many Tie Chains are Needed for a Semicrystalline Polymer to be Ductile?
DESCRIPTION:Prof. Richard A. Register\, Princeton University\nSponsored by Golden Gate Polymer Forum\n6:00 pm-7:00 pm\, Online\, Free/$5 Donation\, Registration required by Aug. 18 at 1pm\n\nAbstract\nSemicrystalline polymers of low glass transition temperature\, such as polyethylene (PE) and hydrogenated polynorbornene (hPN)\, can be either brittle or ductile depending on how well stress can be transmitted between crystallites—such as via tie molecules (TMs)\, chains that directly bridge the intercrystalline amorphous layer. TM content will increase with increasing molecular weight (M)\, or with the fraction of high-M chains in a disperse polymer; it will also increase with decreasing intercrystallite repeat spacing d\, which can be manipulated through thermal history and the incorporation of comonomer.  We have examined the failure mode of model narrow-distribution linear PEs and hPNs\, where d is varied through both crystallization history (either quenching or slowly cooling) and the incorporation of short branches (at variable levels) that are unable to enter the crystals. For a given (co)polymer composition and thermal history\, a rather sharp brittle-to-ductile transition (BDT) is observed with increasing M\, at a value MBDT. However\, when looking across thermal histories and comonomer contents\, MBDT does not correspond to a particular numerical value of the tie molecule fraction (P)\, calculated by the Huang-Brown approach.  Rather\, PBDT increases strongly as crystal thickness decreases\, with both PE and hPN showing similar dependences.  We trace this unanticipated dependence to the loss of TMs during drawing\, with polymers having thinner initial crystals losing a larger fraction of their TMs. This postulate is confirmed by measurements of the post-draw strain-hardening modulus\, which reflects the content of TMs remaining after the material has necked and drawn.  Adding a short amorphous block at the chain end is also found to improve the retention of TMs.  These insights provide guidance for the molecular design of ductile and easily processible polymers (via molecular weight distribution and branch content)\, and how those desirable characteristics can be preserved through rounds of mechanical recycling. \nSpeaker Background\nRichard A. Register is currently Director of the Princeton Materials Institute and Eugene Higgins Professor in the Department of Chemical and Biological Engineering at Princeton University.  His research interests revolve around micro- and nanostructured polymers\, such as semicrystalline polymers\, block copolymers\, polymer blends\, and ionomers\, and range across their synthesis\, physics\, properties\, applications\, and sustainability.  He served as chair of Princeton’s Department of Chemical and Biological Engineering from 2008-2016\, and as Director of the NSF-supported Princeton Center for Complex Materials from 2005-2008.  He received the Charles M.A. Stine Award from the American Institute of Chemical Engineers in 2002\, the Princeton’s School of Engineering and Applied Science Distinguished Teacher Award in 2018\, its inaugural Distinguished Service Award in 2023\, and the inaugural Distinguished Faculty Service Award from Princeton in 2025. He is a Fellow of the American Physical Society\, the American Chemical Society\, and the American Institute of Chemical Engineers.
URL:https://www.siliconvalleyacs.org/event/how-many-tie-chains-are-needed-for-a-semicrystalline-polymer-to-be-ductile/
LOCATION:Virtual
CATEGORIES:Webinar
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