{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:BAFGDY4XQ2I2H6QQWPUSMUK7QA","short_pith_number":"pith:BAFGDY4X","canonical_record":{"source":{"id":"1207.5452","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-23T16:56:32Z","cross_cats_sorted":[],"title_canon_sha256":"1a187a020b3d7003422db4f91375a82dbe063ff483161fc8ea2d2a5fbab65a4a","abstract_canon_sha256":"2b9c474aafb57e15402673e79fa9287558805d9dc1f7867d771b08af37ae13e0"},"schema_version":"1.0"},"canonical_sha256":"080a61e3978691a3fa10b3e926515f8032708fa82957ab49f2d9f22c48584f87","source":{"kind":"arxiv","id":"1207.5452","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5452","created_at":"2026-05-18T01:56:08Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5452v2","created_at":"2026-05-18T01:56:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5452","created_at":"2026-05-18T01:56:08Z"},{"alias_kind":"pith_short_12","alias_value":"BAFGDY4XQ2I2","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"BAFGDY4XQ2I2H6QQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"BAFGDY4X","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:BAFGDY4XQ2I2H6QQWPUSMUK7QA","target":"record","payload":{"canonical_record":{"source":{"id":"1207.5452","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-23T16:56:32Z","cross_cats_sorted":[],"title_canon_sha256":"1a187a020b3d7003422db4f91375a82dbe063ff483161fc8ea2d2a5fbab65a4a","abstract_canon_sha256":"2b9c474aafb57e15402673e79fa9287558805d9dc1f7867d771b08af37ae13e0"},"schema_version":"1.0"},"canonical_sha256":"080a61e3978691a3fa10b3e926515f8032708fa82957ab49f2d9f22c48584f87","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:08.931339Z","signature_b64":"8R3NRPEqXkb7x4xqnflc8nk7kJTMMb0dosKWNaeTpyrjPevISuHVQrrQSUhfRwXEtE73VS0fktlyNS/lskGOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"080a61e3978691a3fa10b3e926515f8032708fa82957ab49f2d9f22c48584f87","last_reissued_at":"2026-05-18T01:56:08.930548Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:08.930548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.5452","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:56:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tIgLq/gPHS+tn/4qcnbVTUOCz1lXQIggAyE2pzjK6S9WUhYj6Bp2BTsfzFy68u7VKwA/SEr8wiJ1SXhyqYEcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:28:49.884006Z"},"content_sha256":"a995ec0a0764cc4db192d9b6a3b12b80405a6bed280f8cfe4b4d35d317f30ef8","schema_version":"1.0","event_id":"sha256:a995ec0a0764cc4db192d9b6a3b12b80405a6bed280f8cfe4b4d35d317f30ef8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:BAFGDY4XQ2I2H6QQWPUSMUK7QA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dielectric study of the glass transition of PET/PEN blends","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"F. Roman, J. A. Diego, J. Belana, J. C. Canadas, J. Sellares, M. Mudarra, P. Colomer, Y. Calventus","submitted_at":"2012-07-23T16:56:32Z","abstract_excerpt":"An analysis of the glass transition of four materials with similar chemical structures is performed: PET, PEN and two PET/PEN blends (90/10 and 70/30 w/w). During the melt processing of the blends transesterification reactions yield block and random PET/PEN copolymers that act as compatibilizers. The blends obtained in this way have been characterized by 1H-NMR and DSC. A degree of randomness of 0.38 and 0.26 has been found for the 90/10 and 70/30 copolymers. It is shown by DSC that this copolimerization is enough to compatibilize the blends. The alpha relaxation, the dielectric manifestation "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5452","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:56:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fkOJPZ8IweZeP5GvKrmYGd/MExIxzxBaC3KL+CyZCu7MGzE8AuTf6PkCuhFSXVESYHNivjI/RdRgSf4ePeg6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T20:28:49.884700Z"},"content_sha256":"28c4c3b6509f21d25b584615a140d2a81d52ea373f0bbb1a9b29a3ddc25feb5c","schema_version":"1.0","event_id":"sha256:28c4c3b6509f21d25b584615a140d2a81d52ea373f0bbb1a9b29a3ddc25feb5c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA/bundle.json","state_url":"https://pith.science/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-06T20:28:49Z","links":{"resolver":"https://pith.science/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA","bundle":"https://pith.science/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA/bundle.json","state":"https://pith.science/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BAFGDY4XQ2I2H6QQWPUSMUK7QA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:BAFGDY4XQ2I2H6QQWPUSMUK7QA","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"2b9c474aafb57e15402673e79fa9287558805d9dc1f7867d771b08af37ae13e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-23T16:56:32Z","title_canon_sha256":"1a187a020b3d7003422db4f91375a82dbe063ff483161fc8ea2d2a5fbab65a4a"},"schema_version":"1.0","source":{"id":"1207.5452","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5452","created_at":"2026-05-18T01:56:08Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5452v2","created_at":"2026-05-18T01:56:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5452","created_at":"2026-05-18T01:56:08Z"},{"alias_kind":"pith_short_12","alias_value":"BAFGDY4XQ2I2","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"BAFGDY4XQ2I2H6QQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"BAFGDY4X","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:28c4c3b6509f21d25b584615a140d2a81d52ea373f0bbb1a9b29a3ddc25feb5c","target":"graph","created_at":"2026-05-18T01:56:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"An analysis of the glass transition of four materials with similar chemical structures is performed: PET, PEN and two PET/PEN blends (90/10 and 70/30 w/w). During the melt processing of the blends transesterification reactions yield block and random PET/PEN copolymers that act as compatibilizers. The blends obtained in this way have been characterized by 1H-NMR and DSC. A degree of randomness of 0.38 and 0.26 has been found for the 90/10 and 70/30 copolymers. It is shown by DSC that this copolimerization is enough to compatibilize the blends. The alpha relaxation, the dielectric manifestation ","authors_text":"F. Roman, J. A. Diego, J. Belana, J. C. Canadas, J. Sellares, M. Mudarra, P. Colomer, Y. Calventus","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-23T16:56:32Z","title":"Dielectric study of the glass transition of PET/PEN blends"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5452","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a995ec0a0764cc4db192d9b6a3b12b80405a6bed280f8cfe4b4d35d317f30ef8","target":"record","created_at":"2026-05-18T01:56:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"2b9c474aafb57e15402673e79fa9287558805d9dc1f7867d771b08af37ae13e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-23T16:56:32Z","title_canon_sha256":"1a187a020b3d7003422db4f91375a82dbe063ff483161fc8ea2d2a5fbab65a4a"},"schema_version":"1.0","source":{"id":"1207.5452","kind":"arxiv","version":2}},"canonical_sha256":"080a61e3978691a3fa10b3e926515f8032708fa82957ab49f2d9f22c48584f87","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"080a61e3978691a3fa10b3e926515f8032708fa82957ab49f2d9f22c48584f87","first_computed_at":"2026-05-18T01:56:08.930548Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:08.930548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8R3NRPEqXkb7x4xqnflc8nk7kJTMMb0dosKWNaeTpyrjPevISuHVQrrQSUhfRwXEtE73VS0fktlyNS/lskGOCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:08.931339Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.5452","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a995ec0a0764cc4db192d9b6a3b12b80405a6bed280f8cfe4b4d35d317f30ef8","sha256:28c4c3b6509f21d25b584615a140d2a81d52ea373f0bbb1a9b29a3ddc25feb5c"],"state_sha256":"af5b722c846d3028b8f9544d1c1c9e29bb571cc3fe95a8da6cb0b591957f3725"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3tB+1XpsLeDNt+k/+DYWVIYs/QPI6EADMYap2JbAUqB2QqIO+vf0q9fSgX66jLDRxd38HpaRcUAy73IuW+K5Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T20:28:49.888440Z","bundle_sha256":"12290bb89f32fbeedd1ae4b95534c90b05e5201dd6b84e02ae7c7f3623842b2a"}}