Loading…
Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide)
In this study, a series of monodispersed poly(L-lactide)(PLLA) were synthesized by the ring-opening polymerization with Schiff base aluminum catalyst, and the effects of the number-average molecular weight(Mn) on the crystallization and melting behaviors of PLLA were investigated by differential sca...
Saved in:
Published in: | 高分子科学:英文版 2016 (1), p.69-76 |
---|---|
Main Author: | |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
cited_by | |
---|---|
cites | |
container_end_page | 76 |
container_issue | 1 |
container_start_page | 69 |
container_title | 高分子科学:英文版 |
container_volume | |
creator | Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang |
description | In this study, a series of monodispersed poly(L-lactide)(PLLA) were synthesized by the ring-opening polymerization with Schiff base aluminum catalyst, and the effects of the number-average molecular weight(Mn) on the crystallization and melting behaviors of PLLA were investigated by differential scanning calorimetry(DSC) and wide-angle X-ray diffraction(WAXD). The total crystallization rate of PLLA was Mn-dependent, which reached the maximum value for PLLA with Mn of 18.6 kg/mol. In addition, when Mn of PLLA was 18.6 kg/mol, the melting enthalpy(ΔHm) showed a maximum value(87.1 J/g), which was the highest reported value till now. The critical temperature for change of crystal formation from ?-form to ?-form crystals increased in the isothermal crystallization process with Mn increasing. In the reheating procedure, high-Mn PLLA demonstrated a small exothermal peak prior to the dominant melting peak, corresponding to crystal transition from ?- to ?-form, but low-Mn PLLA didn't show the peak of crystal transition. These different crystallization and melting behaviors were attributed to the different chain mobility of PLLA with different Mn. |
format | article |
fullrecord | <record><control><sourceid>chongqing</sourceid><recordid>TN_cdi_chongqing_primary_667241963</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><cqvip_id>667241963</cqvip_id><sourcerecordid>667241963</sourcerecordid><originalsourceid>FETCH-chongqing_primary_6672419633</originalsourceid><addsrcrecordid>eNqNjEkKwjAAAIMoWJc_BO-F2iWhV0vFgwUPgscS0rSJxESTKNQX6J_6p37BIj7A08AwzAh46zhKfRQG0Rh4QZggHyOcTsHM2nMQoBgn2ANlXteMOgt1DQstGb1LYuCJiYY7qBV0nMHMtNYRKcWTODE4oipYMOmEauCGcfIQ2nwHBy3bvnvtfUmoExXru_cCTGoiLVv-OAerbX7Mdj7lWjW3YVFejbgQ05YI4TBepyiK_oo-4mxHDw</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide)</title><source>Springer Link</source><creator>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</creator><creatorcontrib>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</creatorcontrib><description>In this study, a series of monodispersed poly(L-lactide)(PLLA) were synthesized by the ring-opening polymerization with Schiff base aluminum catalyst, and the effects of the number-average molecular weight(Mn) on the crystallization and melting behaviors of PLLA were investigated by differential scanning calorimetry(DSC) and wide-angle X-ray diffraction(WAXD). The total crystallization rate of PLLA was Mn-dependent, which reached the maximum value for PLLA with Mn of 18.6 kg/mol. In addition, when Mn of PLLA was 18.6 kg/mol, the melting enthalpy(ΔHm) showed a maximum value(87.1 J/g), which was the highest reported value till now. The critical temperature for change of crystal formation from ?-form to ?-form crystals increased in the isothermal crystallization process with Mn increasing. In the reheating procedure, high-Mn PLLA demonstrated a small exothermal peak prior to the dominant melting peak, corresponding to crystal transition from ?- to ?-form, but low-Mn PLLA didn't show the peak of crystal transition. These different crystallization and melting behaviors were attributed to the different chain mobility of PLLA with different Mn.</description><identifier>ISSN: 0256-7679</identifier><identifier>EISSN: 1439-6203</identifier><language>eng</language><subject>下线 ; 服务 ; 迁移</subject><ispartof>高分子科学:英文版, 2016 (1), p.69-76</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/86788X/86788X.jpg</thumbnail><link.rule.ids>314,780,784,4021</link.rule.ids></links><search><creatorcontrib>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</creatorcontrib><title>Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide)</title><title>高分子科学:英文版</title><addtitle>Chinese Journal of Polymer Science</addtitle><description>In this study, a series of monodispersed poly(L-lactide)(PLLA) were synthesized by the ring-opening polymerization with Schiff base aluminum catalyst, and the effects of the number-average molecular weight(Mn) on the crystallization and melting behaviors of PLLA were investigated by differential scanning calorimetry(DSC) and wide-angle X-ray diffraction(WAXD). The total crystallization rate of PLLA was Mn-dependent, which reached the maximum value for PLLA with Mn of 18.6 kg/mol. In addition, when Mn of PLLA was 18.6 kg/mol, the melting enthalpy(ΔHm) showed a maximum value(87.1 J/g), which was the highest reported value till now. The critical temperature for change of crystal formation from ?-form to ?-form crystals increased in the isothermal crystallization process with Mn increasing. In the reheating procedure, high-Mn PLLA demonstrated a small exothermal peak prior to the dominant melting peak, corresponding to crystal transition from ?- to ?-form, but low-Mn PLLA didn't show the peak of crystal transition. These different crystallization and melting behaviors were attributed to the different chain mobility of PLLA with different Mn.</description><subject>下线</subject><subject>服务</subject><subject>迁移</subject><issn>0256-7679</issn><issn>1439-6203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNjEkKwjAAAIMoWJc_BO-F2iWhV0vFgwUPgscS0rSJxESTKNQX6J_6p37BIj7A08AwzAh46zhKfRQG0Rh4QZggHyOcTsHM2nMQoBgn2ANlXteMOgt1DQstGb1LYuCJiYY7qBV0nMHMtNYRKcWTODE4oipYMOmEauCGcfIQ2nwHBy3bvnvtfUmoExXru_cCTGoiLVv-OAerbX7Mdj7lWjW3YVFejbgQ05YI4TBepyiK_oo-4mxHDw</recordid><startdate>2016</startdate><enddate>2016</enddate><creator>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</creator><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>~WA</scope></search><sort><creationdate>2016</creationdate><title>Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide)</title><author>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-chongqing_primary_6672419633</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>下线</topic><topic>服务</topic><topic>迁移</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</creatorcontrib><collection>维普_期刊</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库- 镜像站点</collection><jtitle>高分子科学:英文版</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sheng Xiang Shao Jun Gao Li Xin-chao Bian Li-dong Feng Xue-si Chen Feng-qi Liu Shao-yong Huang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide)</atitle><jtitle>高分子科学:英文版</jtitle><addtitle>Chinese Journal of Polymer Science</addtitle><date>2016</date><risdate>2016</risdate><issue>1</issue><spage>69</spage><epage>76</epage><pages>69-76</pages><issn>0256-7679</issn><eissn>1439-6203</eissn><abstract>In this study, a series of monodispersed poly(L-lactide)(PLLA) were synthesized by the ring-opening polymerization with Schiff base aluminum catalyst, and the effects of the number-average molecular weight(Mn) on the crystallization and melting behaviors of PLLA were investigated by differential scanning calorimetry(DSC) and wide-angle X-ray diffraction(WAXD). The total crystallization rate of PLLA was Mn-dependent, which reached the maximum value for PLLA with Mn of 18.6 kg/mol. In addition, when Mn of PLLA was 18.6 kg/mol, the melting enthalpy(ΔHm) showed a maximum value(87.1 J/g), which was the highest reported value till now. The critical temperature for change of crystal formation from ?-form to ?-form crystals increased in the isothermal crystallization process with Mn increasing. In the reheating procedure, high-Mn PLLA demonstrated a small exothermal peak prior to the dominant melting peak, corresponding to crystal transition from ?- to ?-form, but low-Mn PLLA didn't show the peak of crystal transition. These different crystallization and melting behaviors were attributed to the different chain mobility of PLLA with different Mn.</abstract></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0256-7679 |
ispartof | 高分子科学:英文版, 2016 (1), p.69-76 |
issn | 0256-7679 1439-6203 |
language | eng |
recordid | cdi_chongqing_primary_667241963 |
source | Springer Link |
subjects | 下线 服务 迁移 |
title | Effects of Molecular Weight on the Crystallization and Melting Behaviors of Poly(L-lactide) |
url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-13T18%3A21%3A45IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-chongqing&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Effects%20of%20Molecular%20Weight%20on%20the%20Crystallization%20and%20Melting%20Behaviors%20of%20Poly%EF%BC%88L-lactide%EF%BC%89&rft.jtitle=%E9%AB%98%E5%88%86%E5%AD%90%E7%A7%91%E5%AD%A6%EF%BC%9A%E8%8B%B1%E6%96%87%E7%89%88&rft.au=Sheng%20Xiang%20Shao%20Jun%20Gao%20Li%20Xin-chao%20Bian%20Li-dong%20Feng%20Xue-si%20Chen%20Feng-qi%20Liu%20Shao-yong%20Huang&rft.date=2016&rft.issue=1&rft.spage=69&rft.epage=76&rft.pages=69-76&rft.issn=0256-7679&rft.eissn=1439-6203&rft_id=info:doi/&rft_dat=%3Cchongqing%3E667241963%3C/chongqing%3E%3Cgrp_id%3Ecdi_FETCH-chongqing_primary_6672419633%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rft_cqvip_id=667241963&rfr_iscdi=true |